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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: Flywheel on October 26, 2014, 07:20:32 pm

Title: No gauge lights or fuel gauge?
Post by: Flywheel on October 26, 2014, 07:20:32 pm

I have searched and searched. I changed my 74 warning light cluster for an 85 or 86 full gauge cluster. I don't have any back lights after replacing all of the bulbs and my gas guage is dropped below empty. I know it's probably a wiring thing but I'm kinda wiring diagram illiterate lol.  Any ideas would be awesome.  I'm not worried about the other guages cause I have  guages for those already working.

Title: No gauge lights or fuel gauge?
Post by: roundhouse on October 27, 2014, 06:20:56 am

The wires changed locations in the plug

We just swapped an 82 cluster into a 77
You have to get the diagram for both and move some wires in the plug

Plus the senders on the engine for temp and oil pressure and different for gauges

Title: Re: No gauge lights or fuel gauge?
Post by: Flywheel on October 27, 2014, 06:22:53 am

Ok thank you. I'll check it tonight

Title: No gauge lights or fuel gauge?
Post by: roundhouse on October 27, 2014, 06:25:30 am

Quote from: Flywheel on October 27, 2014, 06:22:53 am

Ok thank you. I'll check it tonight

I have pics of my home made wiring diagram showing the changes but tapatalk apparently got upgraded recently and I am no longer avail to upload photos?
PM me your email
Maybe I can send em that way

Title: Re: No gauge lights or fuel gauge?
Post by: Flywheel on October 27, 2014, 06:27:59 am

Pm sent

Title: Re: No gauge lights or fuel gauge?
Post by: Flywheel on October 27, 2014, 08:04:51 pm

Got fuel guage working but only 1 blinker and a couple of the lights are working.

Title: Re: No gauge lights or fuel gauge?
Post by: roundhouse on October 28, 2014, 05:16:38 am

Did you get my diagram?

Title: Re: No gauge lights or fuel gauge?
Post by: Flywheel on October 28, 2014, 01:20:03 pm

Yes I used it but I think I have a ground issue.

Title: Re: No gauge lights or fuel gauge?
Post by: Captkaos on November 24, 2014, 01:53:24 pm

did you get this figured out.  You need to verify all of the pins in the cluster harness first or you could short something out.

Title: Re: No gauge lights or fuel gauge?
Post by: Flywheel on December 08, 2014, 08:38:30 pm

I ended up finding a cluster from a 75.  Everything is good now.

Title: Re: No gauge lights or fuel gauge?
Post by: Captkaos on December 09, 2014, 06:51:03 pm

Since the 73-75 version is AMPS it is never really a good idea for swapping things over without pulling every wiring, but since you were dummy lights it should eliminate that issue.  I would think you just had some pins in wrong.  Glad you got it figured out though.