I 'm apparently having an intermittent issue with the wiring in my dash. It seems to be losing the ground connection for the dash circuits including the cigarette lighter. I will notice the dash voltmeter reading low and if I push on the dash it will jump back up to normal. I also see changes in the temp and fuel gauges when this happens and also the backlight is affected.
If I use a meter and check from a solid ground like a seat bolt to the ground side of the cigarette lighter I can see a voltage difference where it should be zero.

My question before I start tearing the dash apart is has anyone dealt with this before and where might I find the connection for grounding the dash circuit?

Thanks - David

 

on my 83 it was at the very bottom left corner of the dash, kinda right above the ebrake pedal. it will be one of those 1/4 inch sized screws facing upwards with a small wire going to it. so just lay on the floor and look up by the pedal hopefully you see it

i hope that fixes it i spent days tracing the wires and eventually found it.

 

There is more than one on the FI models. Wanna say the one by the e-brake is most common problem one since its the lowest. If you look from the engine side of the firewall all the sharp pointy knuckle skinners poing through are a screw and a good place to chase the head on the interior side. Every one won't be a ground but a good number are.

 

Y'all both nailed it. I checked this evening before I ran some errands and found the wire above the ebrake pedal was loose as a goose. I tightened it up and everything seems to work just fine now - thanks a bunch since it saved me a lot of time and effort.

FYI about what I do with my Blazer, here are some posts from another forum I follow:

From 4 years ago, '1987 S-10 Blazer with 3 Radios' and the recent update 'Added more toys to my 'retro' Blazer set-up.

Thanks again for the help!

David

 

no problem, like i said i ended up tearing apart my dash a few times and spent quite a few hours searching for that stupid wire