dash lights ???? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

teeitup · 02-23-2003, 04:41 PM

Ok, my man took the old dash out and put the tach dash in the truck and when he starts it all the dash lights come on. I bought this tach dash and I never had it apart but I don't know if it was torn apart before I got it. Any ideas on what could be wrong? Thanks Randy

*Gee_Emm* · 02-23-2003, 04:56 PM

Is the headlight switch turned on?

chevy_fatman · 02-23-2003, 07:33 PM

All of them?? if somebody took it apart before, they might've put a different circuit board in it, causing to have all of the lights come on. Paul.

teeitup · 02-23-2003, 07:39 PM

Thats what he told me all the lights come on when he starts it. I have the other dash that came out of it I might have to tear it apart and put the tach in it. Is that possible? Thanks Randy

72CustomCamper · 02-23-2003, 08:03 PM

Sounds like a wire is swapped on the main plug that feeds your dash printed circuit.

Trace the paths on the printed circuit to find out which one feeds the lights. Don't confuse it with the common ground shared by all of the dash parts. Make sure the + feed isn't somehow cross-connected to the tachometer.

teeitup · 02-23-2003, 09:18 PM

I wonder since I don't have original tach wiring for it could he somehow of wired it hot to the wrong source? He was going to run a hot wire and a wire to the HEI. As you can tell I don't know what he did for sure but I just didn't want to pay him a bunch to figure it out. Thanks Randy

*Gee_Emm* · 02-24-2003, 12:39 AM

The wires that go to the tach are completey seperate from the lighting for the dash, now that I think about it my early thought of the light switch being on wouldnt be a possiblity because it would stay on constantly, not just with the key being on. Maybe the harness plug for the cluster was put in the wrong way???? It is keyed but who knows it might be possible

ckhd · 02-24-2003, 02:09 AM

Did he have the idiot light system before? The plug wiring is different for those speedo-fuel only dashes. You may want to ask him.

I don't think it's a big deal to change it if that's the case. I remember seeing a post on the board about it a while back.

teeitup · 02-24-2003, 09:13 AM

It had the dash with guages before. I might just have to drive it with the lights on in the dash all the time.

Andy4639 · 02-24-2003, 10:40 PM

I would look at the back of the circuit board and see if all the tabs are good and not touching any of the other ones.Check and see if they are not broken are torn any place. As far as the tach is concerned it has it's own wires coming off the back of the dash. If you want to swap the tach to the old dash all you have to do is interchange the dash peices that you need. The only thing is the tach circuit board and non tach are different. The tach board is cut out around the tach where the non tach isn't. I would think it's in the board some place. Hope this helps.

02-23-2003, 04:41 PM	#1
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	dash lights ???? Ok, my man took the old dash out and put the tach dash in the truck and when he starts it all the dash lights come on. I bought this tach dash and I never had it apart but I don't know if it was torn apart before I got it. Any ideas on what could be wrong? Thanks Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

02-23-2003, 07:33 PM	#3
chevy_fatman Where's my beer? Join Date: Aug 2002 Location: I live in the state of denial.... Posts: 5,620	All of them?? if somebody took it apart before, they might've put a different circuit board in it, causing to have all of the lights come on. Paul. __________________ Paul How do you make the invisible, visible?.........You take it away.

02-23-2003, 07:39 PM	#4
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	Thats what he told me all the lights come on when he starts it. I have the other dash that came out of it I might have to tear it apart and put the tach in it. Is that possible? Thanks Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

02-23-2003, 08:03 PM	#5
72CustomCamper Registered User Join Date: Feb 2003 Location: Bremerton, WA Posts: 86	Sounds like a wire is swapped on the main plug that feeds your dash printed circuit. Trace the paths on the printed circuit to find out which one feeds the lights. Don't confuse it with the common ground shared by all of the dash parts. Make sure the + feed isn't somehow cross-connected to the tachometer. __________________ '72 GMC C20, "2500 Super Custom", Custom Camper, New 454 '93 K2500 Suburban, Old 454 (157K)

02-23-2003, 09:18 PM	#6
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	I wonder since I don't have original tach wiring for it could he somehow of wired it hot to the wrong source? He was going to run a hot wire and a wire to the HEI. As you can tell I don't know what he did for sure but I just didn't want to pay him a bunch to figure it out. Thanks Randy __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

02-23-2003, 04:56 PM	#2
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	Is the headlight switch turned on?

02-24-2003, 12:39 AM	#7
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	The wires that go to the tach are completey seperate from the lighting for the dash, now that I think about it my early thought of the light switch being on wouldnt be a possiblity because it would stay on constantly, not just with the key being on. Maybe the harness plug for the cluster was put in the wrong way???? It is keyed but who knows it might be possible

02-24-2003, 02:09 AM	#8
ckhd Registered User Join Date: Oct 2000 Location: St. Johns, Arizona Posts: 2,660	Did he have the idiot light system before? The plug wiring is different for those speedo-fuel only dashes. You may want to ask him. I don't think it's a big deal to change it if that's the case. I remember seeing a post on the board about it a while back. __________________ my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans?

02-24-2003, 09:13 AM	#9
teeitup Just like to part out trucks!! Join Date: Nov 2001 Location: Meriden, Ks-North of Topeka 10 miles Posts: 27,395	It had the dash with guages before. I might just have to drive it with the lights on in the dash all the time. __________________ 67 Chev swb stepside 4x4 283 4 speed SOLD 72 blazer 4x4 4 speed Cheyenne 72 GMC swb 4x4 fleet 4 speed, original paint 1958 Cameo (one of 1405 built, it was my dads) 2020 chevy Apex 4x4 crew cab 1969 Z28 with the 302 1980 chevy swb 4x4 1964 chevell Malibu SS 1976 K20, sold new originally out of my dads chevy dealership Members that I've met, over 200 probably closer to 300 in the 12 years I've been on this site, everyone I met "It was a pleasure"

02-24-2003, 10:40 PM	#10
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Lights OUT I would look at the back of the circuit board and see if all the tabs are good and not touching any of the other ones.Check and see if they are not broken are torn any place. As far as the tach is concerned it has it's own wires coming off the back of the dash. If you want to swap the tach to the old dash all you have to do is interchange the dash peices that you need. The only thing is the tach circuit board and non tach are different. The tach board is cut out around the tach where the non tach isn't. I would think it's in the board some place. Hope this helps. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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