72 C10 dash ground

[72babyblue]

I recently purchased my 72 C10 and decided to fix some of the more interesting changes previous owner did. They installed a toggle switch for the wiper switch. Ordered new switch pulled everything out and thought everything looked good. Put it back together and as soon as I turn key wipers came on and wouldn't stop.

After pulling switch back out and checking everything I found out the ground wire that was installed to back of oil gauge cover was causing the issue. Disconnect the wire and wiper switch works......BUT with it disconnected now the fuel gauge doesn't it goes work off scale low, high beam light is on when headlights lights are off, turn indicators don't work in dash But blinkers do work.

It appears ground is needed but I thought it was suppose to come through board. I was thinking to replace circuit board, but I am still confused why wipers won't turn off with ground as switch is case grounded normally. Will missing ground cause other issues? Should I look for another issue for running with ground wire applied?

Any help is welcome I learned a lot from other posts I figured this would be easy for someone.

[LockDoc]

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Is this ground wire connected? It is the ground for the cluster....

LockDoc

[72babyblue]

Thanks LockDoc for the picture. I don't have a wire going to the edge and clip. The wire I have is an add on, it goes from under a steering column clamp and was ran to the 1/4 screw holding the cover in place behind the oil pressure gauge.

Where does the correct ground connect to?

[LockDoc]

Originally Posted by 72babyblue

Thanks LockDoc for the picture. I don't have a wire going to the edge and clip. The wire I have is an add on, it goes from under a steering column clamp and was ran to the 1/4 screw holding the cover in place behind the oil pressure gauge.

That may not provide a correct ground to the circuit board, I don't know. I would see if you can find the correct ground wire, it may be hanging under the dash somewhere.....

LockDoc

[72babyblue]

I dig around see if I can find it. If I want to run new wire where does it ground to?

[LockDoc]

Originally Posted by 72babyblue

I dig around see if I can find it. If I want to run new wire where does it ground to?

In the picture I posted the double arrow shows the ground clip and the wire that is connected to it, and the single arrow is pointing to where the same wire connects to the cluster plug....

LockDoc

[72babyblue]

Oh thanks I didn't put it together I thought there was a case ground and the harnes ground. I update once I find something?

[72babyblue]

I was reminded once again how much fun it is to figure out what someone else did.

Thanks Doc for the picture, the previous owner had used the ground and ran it to the back of the non-case ground wiper switch, so when I installed the correct switch it now had a ground on the high speed side that would feed to the low speed output. Once restored to how it should have been gauges, lights and switches all work as expected.

Thanks for the fast response

[LockDoc]

Originally Posted by 72babyblue

I was reminded once again how much fun it is to figure out what someone else did.

Thanks Doc for the picture, the previous owner had used the ground and ran it to the back of the non-case ground wiper switch, so when I installed the correct switch it now had a ground on the high speed side that would feed to the low speed output. Once restored to how it should have been gauges, lights and switches all work as expected.

Thanks for the fast response

Good deal, Glad you got it figured out....

LockDoc