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26 Posts
So this started the other night plowing. I noticed my voltage on my tuner was reading 11.5. I put in a alternator back in the spring. I was like great, another dud. Later on in the night it got back up to 13.5+-. ended up dropping back down to 11+-.
I bought a new 140 amp alt. installed it, still not charging properly. At the 2 wire connector I’m getting 11 (or whatever the batteries arvolts on one pin with KOEO. At first, the other one I get zero volts no matter what.
I researched a bit and saw that if possibly the glow plug relay were bad causing them to stay on, the PCM would not tell the alt to charge. so thinking that I disconnected the GPR
I then saw 11+- volts (again, whatever the batteries read) on both of those 2 pins on the alt connector.
I started the truck and the volts went up to 13, than 13.5 and most I saw was 13.8. So I said sweet, I must have a bad GPR.
wrong. It’s an intermittent connection somewhere on the “charging” side because i now have 10.8 volts to 11.5 volts running.
I have no idea where to look or what to check next. I have good connection on all terminals. I have connection on the red cable on the back of the alternator. I’m completely lost
I bought a new 140 amp alt. installed it, still not charging properly. At the 2 wire connector I’m getting 11 (or whatever the batteries arvolts on one pin with KOEO. At first, the other one I get zero volts no matter what.
I researched a bit and saw that if possibly the glow plug relay were bad causing them to stay on, the PCM would not tell the alt to charge. so thinking that I disconnected the GPR
I then saw 11+- volts (again, whatever the batteries read) on both of those 2 pins on the alt connector.
I started the truck and the volts went up to 13, than 13.5 and most I saw was 13.8. So I said sweet, I must have a bad GPR.
wrong. It’s an intermittent connection somewhere on the “charging” side because i now have 10.8 volts to 11.5 volts running.
I have no idea where to look or what to check next. I have good connection on all terminals. I have connection on the red cable on the back of the alternator. I’m completely lost