Lets start with power steering. I drained the atf and refilled with power steering fluid. No real change. This time, it’s big bubbles. Still squalls like crazy. I may try draining it again and hooking the old hose back up to bypass the cooler and see if it quiets back down. It seems to steer fine, even when bubbly and squalling, and no leaks.
For the alternator, I tried a couple different things today. I don’t know if I learned anything.
Blue is to “P” on the alternator, obviously I have it unhooked.
Brown is to “L” on the alternator, and is going to C2 green connector pin 15. Lt1swap says “charge indicator control (models with generator battery control module, rewire alternator brown wire to this pin to remove gbcm)”
Grey is to “IF” on the alternator, and is going to C2 green connector pin 75. Lt1swap says “generator field duty cycle signal (models with generator battery control module, rewire alternator gray wire to this pin s pin to remove gbcm)”
“G” on the alternator didn’t have a wire.
So the info from Lt1swap matches one of the diagrams I have, but not the other. The 1 shows the brown and grey wires doing the opposite functions.
Pin 15 and pin 75 on this. I call this mess the treasure map.
But on this one, it shows them being the opposite function.
So I’m confused. To add to the confusion, I did some experimenting.
With key on, the brown wire, C2 green 15, does not light up. For the record, the grey wire didn’t light up either.
With key on, the brown wire that went to the stock 87 alternator is hot, but stays on when the truck is running.
So it would seem as if I should hook this up. I took the brown wire out at the computer, jerry rigged it to the brown wire at the firewall with the test light in between them. With it running, it still seems like it is overcharging. If i unhook it, it stops charging. This is what I assumed from the start needed hooked up, even before I ever looked at any diagrams, brown to brown, seems logical. I still think this may be the solution. When I did the serpentine belt accessories on the tbi 5.7, I found an a-dapt-or with the resistor in it. I dug it out when I got home.
But it didn’t seem to be working right. I put the brown wire back in pin 15 and pulled the grey wire out of pin 75, still overcharging. It seemed like this wire did nothing, I noticed no change at all.
On the chance that the one diagram is the correct one, and the other 2 are in fact wrong, I swapped brown and grey at the alternator plug. Still overcharging. I swapped them back around the way they were.
This leads me to is the regulator in the alternator bad. I don’t know. I’m confused. I think my s10 has this same alternator (not the stock s10 alternator, pretty sure one of these is what I swapped in years ago). I will try to look tomorrow and if I have time will swap them around. When I got the pedal and tac module and maf etc from the junkyard, the Escalade I grabbed stuff from had a new alternator, I set it off to the side. Still there as of Thursday. I’ll grab it Monday when I go get another pump.
I feel like I accomplished nothing today.