98 Suburban Running Lights AND sound system issues

[Eubyfied]

Hello everyone...

I have 2 issues I need help with.

1. My running lights or parking lights have quit working. I checked the fuse on the inside fuse box and it is good. I checked there is 13.4V at the fuse. I have checked the bulbs in one of the tail lights. They are all good. The flashers work, the turn signals work, the brake lights work, the head lights work, the high beams work, the daytime running lights work. It appears the headlight switch works because the buzzer comes on with the door open and the light switch on. Any ideas???

2. I recently upgraded my stereo head unit. The rear side door speakers have started not working. They come on occasionally, but not much. The rear pillar 4x10's work, but not the rear door ones. Is there an amp hidden somewhere in the system that doesn't show up on schematics? I ask that because my car had a drivers side tweeter in the door that doesn't show up on any schematics I have found. The car wiring harness schematics I have found only show front + & - and rear + and -. It doesn't make sense to me that the far rear pillar speakers would work and not the rear door ones. It has to be spliced somewhere, but I can't find it

CAN SOMEONE PLEASE HELP....I AM FRUSTRATED BEYOND BELIEF....

 

[Eubyfied]

Running light Issue Update: The multi pin connector going into the main headlight switch must have been loose. When I took the dash off to check on the radio issue I noticed it being cockeyed.

The radio issue is fixed as well. Just FYI: I know there isn't documentation anywhere to back up my claim but a 98 Suburban does have an amp driving the rear door speakers. It needs to be triggered by the AMP line coming from your radio harness. The vehicle wire to trigger the amp is PINK. So for me it was a Blue/White stripe connected to a Pink wire. I had it connected to the Blue wire from the radio harness, but that was the antenea trigger. So the rear speakers only worked when I was listening to Radio. I rarely do that, so that is why I thought they worked only every once and a while.

I hope this info helps someone out. The documentation I have seen says only 2000 and newer have amps, but my 98 must have been an early adopter.....

Happy Modding!!!