i installed another wiring harness and have problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dinnut · 12-21-2003, 06:01 PM

ok, i finally got around to it and pulled the old one out and put the used one i bought in. headlights wouldnt work. dash wouldnt work--like all the lights stay on constant and fuel gauge doesnt work... i tried another dash i had same thing happened.... everything hooked right up. i replaced all the fuses with the ones from my old harness and my tail lights are on constantly......???????????????? after playing alittle my headlights come on but thats it. both turn signal lights and high beam indicator stay on on the dash. i have the ground on.... what could be the problem. also, the plug that goes on the heater controls isnt right one and doesnt have the other part that plugs on the heater behind the glovebox and doesnt have the wire that goes to blower motor???? on my old on it was part of the plug that went to heater controls... anybody know what could be wrong?

*rage'nrat638* · 12-21-2003, 06:16 PM

O M G

COULD NOT EVEN TELL YOU WHERE TO BEGIN....

SOUNDS LIKE YOU GOT SOME WIRE'S CUT,SHORTED,BURNED
somewhere under the dash....
i think i might start at the rear of the fuse box??????

better go buy a very good testing light.....it's going to be your
BEST FRIEND

MAY THE FORCE BE WITH YOU

jef5150 · 12-21-2003, 06:27 PM

what yr harness did you get?,,,,i believe 68,and older "front parking" lights shut off when you pull light switch to turn on head lights,,,,

dinnut · 12-21-2003, 06:44 PM

i dont know waht year harness.... my parking lights stay on when i turn on my headlights...

jef5150 · 12-21-2003, 06:50 PM

fuel gauge,,,,make sure your getting power to the actual gauge,,,,,if you pull the brown wire off the sending unit does the gauge go past full?,,,,,

Maximum Overdrive · 12-21-2003, 08:55 PM

Is your headlight switch good?

jhow66 · 12-22-2003, 01:02 AM

Wrong year harness.

Rooster's 67 · 12-22-2003, 01:07 AM

what was wrong with the first(original) harness?

dinnut · 12-22-2003, 04:03 AM

the other harness was all chopped up. i may end up looking at it and fixing it. the whole dash doesnt work... the old dash did. i put new dash and new harness in at the same time but the old dash doesnt work. headlight switch works bc headlights come on. are harnesses very year specific? im not getting power to actual gauge... i did with old dash and harness though. its all hooked up. my sending unit is bad so it stays at empty all the time

dinnut · 12-22-2003, 04:08 AM

im seeing that the harnesses are same for 69-72 though

Rooster's 67 · 12-22-2003, 04:18 AM

bust out the sodering iron and the heat shrink tubing

dinnut · 12-22-2003, 04:34 AM

ok

**Palf70Step** · 12-22-2003, 01:21 PM

Did the replacement harness and dash come from the same vehicle?

The only thing that comes to mind is you might have a harness for idiot light dash instead of a guage panel dash? You might want to check out the pinout for two to make sure they are the same setup that plugs into your dash.

Here is link to GMC Pauls that shows the different pinouts
http://www.gmcpauls.com/Tech%20Tips1.htm

dinnut · 12-22-2003, 09:56 PM

the old and new harness' connectors look the same to me... i think im gonna stick the old harness back in there

dinnut · 12-23-2003, 09:56 PM

ttt

12-21-2003, 06:01 PM	#1
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	i installed another wiring harness and have problems ok, i finally got around to it and pulled the old one out and put the used one i bought in. headlights wouldnt work. dash wouldnt work--like all the lights stay on constant and fuel gauge doesnt work... i tried another dash i had same thing happened.... everything hooked right up. i replaced all the fuses with the ones from my old harness and my tail lights are on constantly......???????????????? after playing alittle my headlights come on but thats it. both turn signal lights and high beam indicator stay on on the dash. i have the ground on.... what could be the problem. also, the plug that goes on the heater controls isnt right one and doesnt have the other part that plugs on the heater behind the glovebox and doesnt have the wire that goes to blower motor???? on my old on it was part of the plug that went to heater controls... anybody know what could be wrong? __________________ 70 longbed 496/th400/Ford 9"

12-21-2003, 06:44 PM	#4
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	i dont know waht year harness.... my parking lights stay on when i turn on my headlights... __________________ 70 longbed 496/th400/Ford 9"

12-21-2003, 08:55 PM	#6
Maximum Overdrive December 21, 2012 Join Date: Apr 2000 Location: Black Eagle, Montana Posts: 1,634	Is your headlight switch good? __________________ *"!Ama Sua, Ama Kjella, Ama Lllulla!"*

12-22-2003, 01:02 AM	#7
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Wrong year harness. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

12-22-2003, 01:07 AM	#8
Rooster's 67 Registered User Join Date: Sep 2003 Location: DFW Posts: 765	what was wrong with the first(original) harness? __________________ The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

12-21-2003, 06:16 PM	#2
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	O M G COULD NOT EVEN TELL YOU WHERE TO BEGIN.... SOUNDS LIKE YOU GOT SOME WIRE'S CUT,SHORTED,BURNED somewhere under the dash.... i think i might start at the rear of the fuse box?????? better go buy a very good testing light.....it's going to be your BEST FRIEND MAY THE FORCE BE WITH YOU

12-21-2003, 06:27 PM	#3
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	what yr harness did you get?,,,,i believe 68,and older "front parking" lights shut off when you pull light switch to turn on head lights,,,,

12-21-2003, 06:50 PM	#5
jef5150 Inline 69 Join Date: Apr 2003 Location: valleysprings,california Posts: 1,018	fuel gauge,,,,make sure your getting power to the actual gauge,,,,,if you pull the brown wire off the sending unit does the gauge go past full?,,,,,

12-22-2003, 04:03 AM	#9
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	the other harness was all chopped up. i may end up looking at it and fixing it. the whole dash doesnt work... the old dash did. i put new dash and new harness in at the same time but the old dash doesnt work. headlight switch works bc headlights come on. are harnesses very year specific? im not getting power to actual gauge... i did with old dash and harness though. its all hooked up. my sending unit is bad so it stays at empty all the time __________________ 70 longbed 496/th400/Ford 9"

12-22-2003, 04:08 AM	#10
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	im seeing that the harnesses are same for 69-72 though __________________ 70 longbed 496/th400/Ford 9"

12-22-2003, 04:18 AM	#11
Rooster's 67 Registered User Join Date: Sep 2003 Location: DFW Posts: 765	bust out the sodering iron and the heat shrink tubing __________________ The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

12-22-2003, 04:34 AM	#12
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	ok __________________ 70 longbed 496/th400/Ford 9"

12-22-2003, 01:21 PM	#13
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,083	Did the replacement harness and dash come from the same vehicle? The only thing that comes to mind is you might have a harness for idiot light dash instead of a guage panel dash? You might want to check out the pinout for two to make sure they are the same setup that plugs into your dash. Here is link to GMC Pauls that shows the different pinouts http://www.gmcpauls.com/Tech%20Tips1.htm __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

12-22-2003, 09:56 PM	#14
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	the old and new harness' connectors look the same to me... i think im gonna stick the old harness back in there __________________ 70 longbed 496/th400/Ford 9"

12-23-2003, 09:56 PM	#15
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	ttt __________________ 70 longbed 496/th400/Ford 9"



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