Alternator Question?
Junior User
Joined: Jun 2007
Posts: 75
Likes: 0
From: Port McNeill BC Canada
I know this will sound odd but check you fuses and if the one for the overdrive is popped take the stearing coulum cover off and check the wires from the overdrive
switch rubbing around the key tumbler.Ive seem this before.This fuse controles the
charging system and power to the gages.The truck not running is probbly due to running out of battery power.
switch rubbing around the key tumbler.Ive seem this before.This fuse controles the
charging system and power to the gages.The truck not running is probbly due to running out of battery power.
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Junior User
Joined: Jun 2006
Posts: 64
Likes: 0
I think the voltage regulator harness is bad. When I unplug it and insert a tester into it I can not get a reading form any of the three ports. Also at start up the battery light does not come on. Will Find a harness and swap it out.
Any comment on the battery light not coming on?
Any comment on the battery light not coming on?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by twjull
I think the voltage regulator harness is bad. When I unplug it and insert a tester into it I can not get a reading form any of the three ports. Also at start up the battery light does not come on. Will Find a harness and swap it out.
Any comment on the battery light not coming on?
Any comment on the battery light not coming on?
I didn't know that the fuse for the OD also powers the charge circuit.
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Junior User
Joined: Jun 2006
Posts: 64
Likes: 0
Originally Posted by Kwikkordead
I would check on what puddle jumper said in the previous post to this one first.
I didn't know that the fuse for the OD also powers the charge circuit.
I didn't know that the fuse for the OD also powers the charge circuit.
So I started to look through the engine compartment for any signs of bad wires and found a spot.
Some squarrel had start to build a nest and chewed one wire.
Here is location I found it and maybe someone can tell me what it does?
If you are stand next to the truck and looking into the engine compartment next to the front passenger tire you will see the battery, right on top of the wheel well (for the passenger tire) and hugging the front quarter panel, there is a wiring harness that has a plug on it with two green wires with a red stripe coming out of it.
The squarrel chewed the two green wires leaving little stubs of wire on the plug but I can not find were they went to, if anywhere? Did it go somewhere or just loop out and back? And what does it do?
Postmaster
Joined: Nov 2003
Posts: 3,595
Likes: 0
From: Utah County, UT
I don't know the exact wires you are referring to, but it almost sounds like they go to one of the solenoids around the vacuum canister. Are you able to follow them out to see where they go?
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Junior User
Joined: Jun 2006
Posts: 64
Likes: 0
I checked all around the vacuum canister and I can not find the other end of it. Does go into the vacuum canister or somewhere else? If it goes into the vacuum canister underneith I will have to remove the canister to find it.
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Junior User
Joined: Jun 2006
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I checked my freinds truck and the wire goes out and loops back into the plug. Solves that mystery. Still curious what the plug might be for and why it loops out and back in? Will get a new plug or fix the one i have and see if the low voltage issue is solved.
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Junior User
Joined: Jun 2006
Posts: 64
Likes: 0
Originally Posted by twjull
I checked my freinds truck and the wire goes out and loops back into the plug. Solves that mystery. Still curious what the plug might be for and why it loops out and back in? Will get a new plug or fix the one i have and see if the low voltage issue is solved.
Logistics Pro
Joined: Nov 2006
Posts: 3,679
Likes: 370
From: Fallon,NV & Bainbridge OH
What are your voltages now that it is fixed? I would like to compare your numbers with what my truck is doing.
I was going to do some research on the voltage issue today as I noticed last evening my voltage seems to be droping more at idle than it used to. The voltage is just over 12v on start-up then climbs over a couple minutes as the batteries come back up, but it has started to drop at idle at stops, causing the dash lights to dim, rev the engine and it climbs back to just shy of 14v. Batteries were new last Oct when I bought the truck and the aternator had been replaced with a Napa unit sometime prior to my purchasing the truck. My guess is a something within the alt. But one way to diagnose the problem is with all the experience on this web site.
Thanks for the help.
Dave
I was going to do some research on the voltage issue today as I noticed last evening my voltage seems to be droping more at idle than it used to. The voltage is just over 12v on start-up then climbs over a couple minutes as the batteries come back up, but it has started to drop at idle at stops, causing the dash lights to dim, rev the engine and it climbs back to just shy of 14v. Batteries were new last Oct when I bought the truck and the aternator had been replaced with a Napa unit sometime prior to my purchasing the truck. My guess is a something within the alt. But one way to diagnose the problem is with all the experience on this web site.
Thanks for the help.
Dave
