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**JIMs70GMC** · 04-05-2004, 08:40 AM

Have a couple questions concerning electrical connections in the subject swap.
Background, I put a 1970 auto cab on a 1971 manual chassis. I swapped the auto steering column for a 1970 manual column. Of course i was unable to hook up the two connectors (neu. sfty and back-up) on the column.
What do I need to do with these two connectors? I already shorted the neu sfty connector. But what about the back-up connector? I'm also having problems with the function column items: Hazards work, turn signals do not. Horn does not work but have ground under button. Dash lights work, headlights, high beans work front side marker lights work. Parking lights not connected. rear wiring harness cut before rear cross member. Any insight?

JimKshortstep4x4 · 04-05-2004, 09:23 AM

Do you have the column shift transmission or the floor shift transmission?

Jim

**JIMs70GMC** · 04-05-2004, 09:52 AM

Jim, it's a floor shift 4wd 3/4 ton.

JimKshortstep4x4 · 04-05-2004, 10:34 AM

You could connect the back up lights to the backup light switch on the transmission. Someone may have the necessary wires.

Jim

**CPNE** · 04-05-2004, 11:24 AM

Your turn signals may not work because your rear harness is not connected to the tailights yet. It will not blink, even up front, but your signal indicator on the dash should light up solid green. This was GM's way of letting you know a bulb is burnt out. That's my recollection anyway.

As for the backup lights, Jim is correct. Do you have your old engine harness still? (the one the starter is wired up with). If so, this harness will have the proper pigtail for the backup switch on the tranny. f you splice this to your auto harnesse's backup wiring, it should work for ya. Yoy will have to get creative to route your wiring though.

**JIMs70GMC** · 04-05-2004, 11:30 AM

Jeff, The bulbs do glow a faint green when I turn the turn signals on. The front parking lights are not there either. The harness from the firewall out is the one from the manual chassis, so I'll splice it in. Thanks!

**CPNE** · 04-05-2004, 11:36 AM

Then your turn signal issue should be resolved when you get the circuit completed and grounded. Good luck

**JIMs70GMC** · 04-05-2004, 11:43 AM

Jeff, Did you order your Exhaust?
I never knew that about the turn signals! My day is complete, learned something new about my trucks!

**CPNE** · 04-05-2004, 11:46 AM

Quote:

Originally posted by JIMs70GMC
Jeff, Did you order your Exhaust?

Not yet, still need to but the immediate need has been back-burnered since we just bought this

**JIMs70GMC** · 04-05-2004, 12:10 PM

Jeff I saw that. Very nice. Why not make it 4wd? Which rear axle is that the H072 or the next one up, not sure about the RPO?

**CPNE** · 04-05-2004, 12:15 PM

Same axle housing as on the 3/4 tons I believe.

**JIMs70GMC** · 04-05-2004, 12:22 PM

So it's not an 11000lb axle? I thought they had a larger ring gear something like 12.5"

**CPNE** · 04-05-2004, 12:29 PM

Quote:

Originally posted by JIMs70GMC
So it's not an 11000lb axle? I thought they had a larger ring gear something like 12.5"

Nope. The GVW on the vin tag reads 10,000. It's got a massive spring pack and overloads though.

**JIMs70GMC** · 04-05-2004, 12:32 PM

Gotcha. Still 10000lbs is quite impressive. I was thinking of upgrading my rear brakes to the 13"x2" variety. I'm not sure if I have the 12x2 or 11.?x2.? ones yet. Will find out today when i pull the rear axles/drums off.

Dean · 04-05-2004, 01:37 PM

My turn signals did the same thing before I had everything hooked up and grounded. I wouldn't worry about the lights until you have everything hooked up.

I think you have the smaller of the two sized brakes on your 71. At least they looked smaller than the ones on both of my K20s when you were changing the wheels around. I'm sure they would be plenty of brake though. I have parts for the smaller ones if needed. You will have to change the backing plates and all if you go with the larger ones. I did this on my brothers truck..different backing plates, wheels cylinders, shoes, drums.... I don't think it was worth it. Some drums are finned and some aren't also.

Yeah those rearends are the same and I've even seen a few dumptrucks with 6 something gears in them. That would make a stump puller.

I got my stainless exhaust on saturday. I'll have to post pics soon.

Jeepster376 · 04-05-2004, 02:03 PM

Where did you get stainless exhaust from?

Dean · 04-05-2004, 03:06 PM

Stainless Mufflers came from Allen's Stainless in Indiana. I believe they were actually Chevelle mufflers. I custom bent all of the stainless pipe. Walker sells the stainless pipe in 10' sections. It was about $130.00 for three pieces. It sounds just right for me. I didn't want it loud and obnoxious like my other one with Borlas.

04-05-2004, 08:40 AM	#1
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	auto-manual Have a couple questions concerning electrical connections in the subject swap. Background, I put a 1970 auto cab on a 1971 manual chassis. I swapped the auto steering column for a 1970 manual column. Of course i was unable to hook up the two connectors (neu. sfty and back-up) on the column. What do I need to do with these two connectors? I already shorted the neu sfty connector. But what about the back-up connector? I'm also having problems with the function column items: Hazards work, turn signals do not. Horn does not work but have ground under button. Dash lights work, headlights, high beans work front side marker lights work. Parking lights not connected. rear wiring harness cut before rear cross member. Any insight? __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

04-05-2004, 09:52 AM	#3
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Jim, it's a floor shift 4wd 3/4 ton. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

04-05-2004, 11:24 AM	#5
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	Your turn signals may not work because your rear harness is not connected to the tailights yet. It will not blink, even up front, but your signal indicator on the dash should light up solid green. This was GM's way of letting you know a bulb is burnt out. That's my recollection anyway. As for the backup lights, Jim is correct. Do you have your old engine harness still? (the one the starter is wired up with). If so, this harness will have the proper pigtail for the backup switch on the tranny. f you splice this to your auto harnesse's backup wiring, it should work for ya. Yoy will have to get creative to route your wiring though. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

04-05-2004, 11:30 AM	#6
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Jeff, The bulbs do glow a faint green when I turn the turn signals on. The front parking lights are not there either. The harness from the firewall out is the one from the manual chassis, so I'll splice it in. Thanks! __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

04-05-2004, 11:36 AM	#7
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	Then your turn signal issue should be resolved when you get the circuit completed and grounded. Good luck __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

04-05-2004, 09:23 AM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Do you have the column shift transmission or the floor shift transmission? Jim

04-05-2004, 10:34 AM	#4
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	You could connect the back up lights to the backup light switch on the transmission. Someone may have the necessary wires. Jim

04-05-2004, 11:43 AM	#8
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Jeff, Did you order your Exhaust? I never knew that about the turn signals! My day is complete, learned something new about my trucks! __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

04-05-2004, 12:10 PM	#10
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Jeff I saw that. Very nice. Why not make it 4wd? Which rear axle is that the H072 or the next one up, not sure about the RPO? __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

04-05-2004, 12:15 PM	#11
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	Same axle housing as on the 3/4 tons I believe. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

04-05-2004, 12:22 PM	#12
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	So it's not an 11000lb axle? I thought they had a larger ring gear something like 12.5" __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

04-05-2004, 12:32 PM	#14
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Gotcha. Still 10000lbs is quite impressive. I was thinking of upgrading my rear brakes to the 13"x2" variety. I'm not sure if I have the 12x2 or 11.?x2.? ones yet. Will find out today when i pull the rear axles/drums off. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

04-05-2004, 01:37 PM	#15
Dean Senior Member Join Date: Jan 2000 Location: Cincinnati, Ohio Posts: 1,492	My turn signals did the same thing before I had everything hooked up and grounded. I wouldn't worry about the lights until you have everything hooked up. I think you have the smaller of the two sized brakes on your 71. At least they looked smaller than the ones on both of my K20s when you were changing the wheels around. I'm sure they would be plenty of brake though. I have parts for the smaller ones if needed. You will have to change the backing plates and all if you go with the larger ones. I did this on my brothers truck..different backing plates, wheels cylinders, shoes, drums.... I don't think it was worth it. Some drums are finned and some aren't also. Yeah those rearends are the same and I've even seen a few dumptrucks with 6 something gears in them. That would make a stump puller. I got my stainless exhaust on saturday. I'll have to post pics soon.

04-05-2004, 02:03 PM	#16
Jeepster376 Registered User Join Date: Feb 2004 Location: Massachusetts Posts: 269	Where did you get stainless exhaust from? __________________ 72 Cheyenne Super 4x4 SWB

04-05-2004, 03:06 PM	#17
Dean Senior Member Join Date: Jan 2000 Location: Cincinnati, Ohio Posts: 1,492	Stainless Mufflers came from Allen's Stainless in Indiana. I believe they were actually Chevelle mufflers. I custom bent all of the stainless pipe. Walker sells the stainless pipe in 10' sections. It was about $130.00 for three pieces. It sounds just right for me. I didn't want it loud and obnoxious like my other one with Borlas.



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