Gauge issues

[hold24]

I’ve read all the past gauge threads and haven’t been able to find my answer..
presently all my gauge lights , tac, and mechanical oil pressure work but nothing else.. I’ve replaced fender fuses, Headlight switch, ignition switch and circuit membrane .. Gas, battery, temp are dead.. It was a factory gauge truck but no tac... Is it possible I have 3 individual problems .. I’ve been under this dash for weeks my back is killing me lol....

[rpmerf]

Each of these issues is going to stem from 1 of 3 things.

Bad sender. For coolant and gas, you can touch the wire directly to ground and it should pin the gauge.

Broken wire or bad connection. Either an ohm test or continuity test on the wire that connects to the sender, and the plug that connects to the back of the gauge. Make sure all connections are clean.

Bad gauge. Should be able to wire them up independent of the gauge cluster.

[A1971Blazer]

Always... always.... always..check the ground
lots and lots of DC circuit issues are bad grounds
your mechanical gauges don't need a power source and ground.... the electric ones do
do your instrument lights work when you turn on the headlights?

[hold24]

Originally Posted by A1971Blazer

Always... always.... always..check the ground
lots and lots of DC circuit issues are bad grounds
your mechanical gauges don't need a power source and ground.... the electric ones do
do your instrument lights work when you turn on the headlights?

yes! the instrument lights turn on with the headlights

[hold24]

I noticed on my ignition switch harness the plastic clip not wires have some melting on the side of the accessory wires... The plastic clip is also broken on that side.
Is there away of pulling out the wires and just replacing the plastic clip instead of splicing in a new pigtail..

[rpmerf]

Should be able to. There is usually a tab on the metal tab that hold it in the plastic clip.

[jaros44sr]

Originally Posted by hold24

I noticed on my ignition switch harness the plastic clip not wires have some melting on the side of the accessory wires... The plastic clip is also broken on that side.
Is there away of pulling out the wires and just replacing the plastic clip instead of splicing in a new pigtail..

at risk of burning your truck to the ground, I would look into why something is getting that hot, do have alot of amps draw on that wire

[hold24]

Originally Posted by jaros44sr

at risk of burning your truck to the ground, I would look into why something is getting that hot, do have alot of amps draw on that wire

The broken clip on the ignition harness is on that side where the plastic clip melted. The wires are in perfect condition which is weird. I was thinking it didn’t have a solid connection . That would cause it to get hot and melt. I’m wanting to switch that clip out without splicing in a new pig tail....

[rpmerf]

If it wasn't clear the metal tab I was talking about, here is a link with an image of the connector. That tab sticking out will hold it in place, Usually can push a small pick in there the fold down the tab and pull the connector out.

https://www.repairconnector.com/univ...2-awg-25-pack/

[hold24]

yes I got it thanks ! I'm going to swap out clip this weekend. Ill keep my fingers cross thats the problem...