Russm
Active member
- 244
- 69
- 28
- Location
- Ft. Wainwright, AK
Driving me crazy.
My first Alaskan winter. When it started to get cold the alts started to squeal slightly, and Gen2 would stay lit when turning the truck on. A small throttle bump and both would go away. As it got colder the squeal and Gen2 stayed on longer until now only the squeal goes away when the truck warms up but Gen2 stays lit. The Alaska winter also broke a bunch of stuff I probably shouldn't have been putting off. When I was finally getting the truck back on the road. Both Alts were not putting out correct voltage (measured at the alt). Also they both squealed loud enough to make your ears bleed. Found rebuild kits online, followed the write up found here. Installed them back, voltage now does a yo-yo. Ok bad (new) regulator. Replaced regulator a couple times, no improvement. Lost confidence in my own work, got 2 new alts from hillbilly wizard. Bolt them on. Drivers side squeals a little initially, I watch the voltage bump up to 14.6v after some generous throttle, squeal stops. Passenger side: squeals with throttle applied until engine is fully warmed up. Output is around 12.9v measured at the Alt.
I've tried belt dressing, seemed to marginally help. All the belts are less than 6 months old.
The squeal returns when running the heater blower on high along with the headlights.
Have traced all the wires, following the Gen2 troubleshooting guide. Replaced the diode behind the dash just in case. Cleaned all the connections in the circuit
What else am I missing?
Wires corroded inside the insulation? enough for a continuity test with the multimeter, but not enough for the circuit to work?
This truck is an ex-police vehicle. Hacked up wires under the dash. Have I missed one that's cut or worse, are there some extra ones in there causing this problem?
Time to find an unmolested harness?![](//emoji.tapatalk-cdn.com/emoji58.png)
Sent from my LM-V600 using Tapatalk
My first Alaskan winter. When it started to get cold the alts started to squeal slightly, and Gen2 would stay lit when turning the truck on. A small throttle bump and both would go away. As it got colder the squeal and Gen2 stayed on longer until now only the squeal goes away when the truck warms up but Gen2 stays lit. The Alaska winter also broke a bunch of stuff I probably shouldn't have been putting off. When I was finally getting the truck back on the road. Both Alts were not putting out correct voltage (measured at the alt). Also they both squealed loud enough to make your ears bleed. Found rebuild kits online, followed the write up found here. Installed them back, voltage now does a yo-yo. Ok bad (new) regulator. Replaced regulator a couple times, no improvement. Lost confidence in my own work, got 2 new alts from hillbilly wizard. Bolt them on. Drivers side squeals a little initially, I watch the voltage bump up to 14.6v after some generous throttle, squeal stops. Passenger side: squeals with throttle applied until engine is fully warmed up. Output is around 12.9v measured at the Alt.
I've tried belt dressing, seemed to marginally help. All the belts are less than 6 months old.
The squeal returns when running the heater blower on high along with the headlights.
Have traced all the wires, following the Gen2 troubleshooting guide. Replaced the diode behind the dash just in case. Cleaned all the connections in the circuit
What else am I missing?
Wires corroded inside the insulation? enough for a continuity test with the multimeter, but not enough for the circuit to work?
This truck is an ex-police vehicle. Hacked up wires under the dash. Have I missed one that's cut or worse, are there some extra ones in there causing this problem?
Time to find an unmolested harness?
![](http://emoji.tapatalk-cdn.com/emoji58.png)
Sent from my LM-V600 using Tapatalk