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-   -   1978 K30 Gauge issues-HELP HELP HELP (https://67-72chevytrucks.com/vboard/showthread.php?t=774305)

ddc456 10-31-2018 07:20 PM
1978 K30 Gauge issues-HELP HELP HELP
 
I'm at a loss on where to look. none of the gauges or lights in the dash are working. It's only when i lift the turn signal to the right that both turn signal indicators and the blue light indicators for the hi beams start flashing like my hazard are on.......
The ground off of the wiring harness inside the cab is connected to the BUSS Ground connector...like i said, i don't know where to look next.

Anyone been in the same situation? what or where should i try next?

Thanks

Palf70Step 11-01-2018 08:00 AM
Re: 1978 K30 Gauge issues-HELP HELP HELP
 
What is the condition of you circuit board on the backside of you gauge cluster? Mine is messed up and seems to be causing a similar short there. I am in the process of replacing that circuit board now.

ddc456 11-01-2018 10:50 AM
Re: 1978 K30 Gauge issues-HELP HELP HELP
 
Quote:
Originally Posted by Palf70Step (Post 8375689)
What is the condition of you circuit board on the backside of you gauge cluster? Mine is messed up and seems to be causing a similar short there. I am in the process of replacing that circuit board now.
well see i've tried 4 different gauge packs, and all with similar results, but that is going to be my next try.

hatzie 11-01-2018 11:04 AM
Re: 1978 K30 Gauge issues-HELP HELP HELP
 
Are all of the black ground wires solidly connected back to the buss bar?

The Ground and power wires have splices in the harness about 6-8" from the cluster plug. These can loosen up.

Printed circuit issues would cause this as well.
Do your gauges work?

ddc456 11-01-2018 11:29 AM
Re: 1978 K30 Gauge issues-HELP HELP HELP
 
Quote:
Originally Posted by hatzie (Post 8375788)
Are all of the black ground wires solidly connected back to the buss bar?

The Ground and power wires have splices in the harness about 6-8" from the cluster plug. These can loosen up.

Printed circuit issues would cause this as well.
Do your gauges work?
ground is good to the Buss Bar, gauges do not work. when i roll the head light switch like i'm going to turn the dome light on, the gauges (oil pressure, volts/amp) start swing every which direction, but the background lights to the gauges kind of work (off and on)

hatzie 11-01-2018 02:17 PM
Re: 1978 K30 Gauge issues-HELP HELP HELP
 
That sounds like a bad ground.

andyh1956 11-01-2018 04:42 PM
Re: 1978 K30 Gauge issues-HELP HELP HELP
 
My S10 did this XACT same thing! Ground strip that grounded the gauge pod at the pod plug was open.

ddc456 11-05-2018 03:00 PM
Re: 1978 K30 Gauge issues-HELP HELP HELP
 
Bad ground at the Buss Bar was the problem. Now i just need to figure why the fuel gauge isn't working. Stuck on "E" even switching tanks....

hatzie 11-05-2018 03:07 PM
Re: 1978 K30 Gauge issues-HELP HELP HELP
 
A dead shorted sender wire between the valve and the cluster plug would do that.

ddc456 11-05-2018 06:14 PM
Re: 1978 K30 Gauge issues-HELP HELP HELP
 
Quote:
Originally Posted by hatzie (Post 8378323)
A dead shorted sender wire between the valve and the cluster plug would do that.
i'll be looking into that tonight. thanks for the help.


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