Hi, 89 350 tbi 700r4 burb. I can't seem to locate a wiring schematic for my fuse box. My Haynes manual doesn't show the wires that feed the fuse box, which is where I narrowed my problem to. Does anyone have such a diagram that could post it up? Thanks!
If anyone cares, here is the background of the problem:
5 years ago a fusible link blew for whatever reason. I had no idea what a fusible link was but I could tell no power was getting through it to the cab, so in my ignorance I decided to bypass it with a wire to get home. I bypassed it, then some wires at the firewall going into the fuse box started burning.
I towed it home and repaired the burnt wires and replaced the fusible link and all was well.
Fast forward 5 years, vehicle dies suddenly on the road. All links are good. I get a constant 12v to the tumbler but none coming out from pink IGN / ACC wire. Pink wire shows 1.5 volts with ignition on. I think the tumbler switch is bad, so I jump the 12v hot wire to the pink wire and I watch the voltage at the hot wire drop to 1-2volts.
Since all my fuses are good, this leads me to believe my ACC / IGN wire is grounding behind the fuse box (it tests fine from tumbler to fuse box). I must have overlooked something five years ago or did a poor repair job...Hence my need for a diagram. I want to know what is supposed to go where before I dive in there so I can do a better job this time around.
*edit: I just noticed the pink wire is IG1, not ACC
If anyone cares, here is the background of the problem:
5 years ago a fusible link blew for whatever reason. I had no idea what a fusible link was but I could tell no power was getting through it to the cab, so in my ignorance I decided to bypass it with a wire to get home. I bypassed it, then some wires at the firewall going into the fuse box started burning.
I towed it home and repaired the burnt wires and replaced the fusible link and all was well. Fast forward 5 years, vehicle dies suddenly on the road. All links are good. I get a constant 12v to the tumbler but none coming out from pink IGN / ACC wire. Pink wire shows 1.5 volts with ignition on. I think the tumbler switch is bad, so I jump the 12v hot wire to the pink wire and I watch the voltage at the hot wire drop to 1-2volts.
Since all my fuses are good, this leads me to believe my ACC / IGN wire is grounding behind the fuse box (it tests fine from tumbler to fuse box). I must have overlooked something five years ago or did a poor repair job...Hence my need for a diagram. I want to know what is supposed to go where before I dive in there so I can do a better job this time around.
*edit: I just noticed the pink wire is IG1, not ACC
