No tail lights or cluster lights

[Cuba]

O look! It's the same as his signature.

Yeah, on my end I see no signature.

You must be registered for see images attach

I did try looking for something before asking.


Thanks BlueOX. Very appropriate but even more appropriate would be jacka$$ Jim.

 

[Blue Ox]

It is on his profile, but it's smart not to @$$ume. Plenty of people here have multiple vehicles or are working on something they don't own.

 

[Trogdor]

Yeah, that’s my fault. I should’ve stated it at the beginning.

 

[Trogdor]

All right. Did some more poking around shortly after I got home. Used a test light on the gauge harness and position 1 and 2 are getting power so am I right to assume the Inst lights are getting power even though they’re not actually lit up? What does this mean?

Also, found the orange and white wire that run to the back of the cab running from the fuse block. Using the test light the orange is getting power but not the white. Should they both begetting power?

I also changed the bulbs in the taillights with nothing new and using the test light on the sockets and got nothing.

 

[Blue Ox]

Did you go here and download the schematic for your truck?

https://www.gmsquarebody.com/threads/1973-1991-wiring-manuals.14498/

 

[73c20jim]

O look! It's the same as his signature.

Yeah, on my end I see no signature.

You must be registered for see images attach

I did try looking for something before asking.


Thanks BlueOX. Very appropriate but even more appropriate would be jacka$$ Jim.

It is on his profile, but it's smart not to @$$ume. Plenty of people here have multiple vehicles or are working on something they don't own.

Yeah, on my end I see no signature.

You must be registered for see images attach

I did try looking for something before asking.


Thanks BlueOX. Very appropriate but even more appropriate would be jacka$$ Jim.

It's a ******' joke. Lighten up!

 

[Blue Ox]

I tried to diffuse it with humor. We can see how that worked out.

 

[73c20jim]

Need to write a book "Sarcasm for beginners."

 

[Cuba]

Sorry dude, didn't see it as sarcasm. Moving on.

All right. Did some more poking around shortly after I got home. Used a test light on the gauge harness and position 1 and 2 are getting power so am I right to assume the Inst lights are getting power even though they’re not actually lit up? What does this mean?

A good idea is to print out those schematics for the lights. Then mark what & where you've checked and what results were.

Also, found the orange and white wire that run to the back of the cab running from the fuse block. Using the test light the orange is getting power but not the white. Should they both begetting power?

Orange is power out from headlight switch to light up interior light only when dome switched on or with door open. Good bright test light? Make sure to test with door closed or remove that door switch, so you're not getting skewed readings.

White is the ground side to that same circuit. Should be hot once dome is switched on, because it's completing the circuit. You said this wasn't lit? Move test light clamp to battery positive and check for a good ground on that white wire with the dome switch OFF. Should light. Otherwise this is 1 issue.

All I'm focusing on right now is the headlight switch and the lack of parking lights

 

[Trogdor]

Did you go here and download the schematic for your truck?

https://www.gmsquarebody.com/threads/1973-1991-wiring-manuals.14498/

Thanks for this! This is really going to help me out.

 

[73c20jim]

Sorry dude, didn't see it as sarcasm. Moving on.

Sorry, I'm from NY. Sarcasm is a second language.

 

[Cuba]

Sorry, I'm from NY. Sarcasm is a second language.

Ahhh, so that's what it is. I'm in Philly, all lost in translation with that crap NY accent.

 

[Trogdor]

Diddled around some more this morning. Light blue and dark blue (15 and 20) aren’t getting power. Checked fuse and it’s good, replaced it anyway to no avail. I’m guessing now that I have a bad connection of sorts to the fuse block. Could I be wrong in this assumption as my front indicators, low and high beams still work?

I’ve pored over multiple wiring diagrams and the schematics. I’m really at a loss.

 

[Blue Ox]

The circuit list says the 15 is front RH directional lamps and 20 is the stop lamps. You say they work. I think you're looking for circuit 9 for taillights and rear side markers. Also, there are plug connectors in the harness back there that you'll want to check.

 

[Trogdor]

Well... I clearly missed that one.