high amp Battery Drain
#21
05-07-2016, 09:32 AM
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kornfused
Hey Bunker, there were 2 main reasons for the drain, as I see it:
1) The hood light (1 amp) and the off-draw circuit (500mA). yea hood amp was the 1 amp draw I was getting. so maybe the battery drain problem is solved (I hope) I think 0.058 amps is about normal, that was the IOD fuse and Seat belt fuse causing that rest down to 0.008 amps didn't test any further
2) The transmission circuitry, caused by leaving the jumper in for the Transmission Relay. This jumper was supplying 12 volts to the transmission circuitry all the time, regardless of whether the engine was running, or even if the key wasn't in the ignition switch. BAD JUMPER!!! BETTER TO SEE CEL The cel is your friend should I remove the jumper at night when im not driving it until I can find the short?
I did testing there that unregisterduser told me to do. and going from that point with no jumper. but yes I still have to have jumper in to drive truck
DID WE EVER CHECK TO SEE WHY WE WERE GETTING THOSE STRANGE VOLTAGES AT THE COIL?
1) The hood light (1 amp) and the off-draw circuit (500mA). yea hood amp was the 1 amp draw I was getting. so maybe the battery drain problem is solved (I hope) I think 0.058 amps is about normal, that was the IOD fuse and Seat belt fuse causing that rest down to 0.008 amps didn't test any further
2) The transmission circuitry, caused by leaving the jumper in for the Transmission Relay. This jumper was supplying 12 volts to the transmission circuitry all the time, regardless of whether the engine was running, or even if the key wasn't in the ignition switch. BAD JUMPER!!! BETTER TO SEE CEL The cel is your friend should I remove the jumper at night when im not driving it until I can find the short?
I did testing there that unregisterduser told me to do. and going from that point with no jumper. but yes I still have to have jumper in to drive truck
DID WE EVER CHECK TO SEE WHY WE WERE GETTING THOSE STRANGE VOLTAGES AT THE COIL?
never followed up on the coil thing either. ill deal with that when we find the relay problems.
thanks for your advice its very helpfull
Last edited by bunker; 05-07-2016 at 09:39 AM.
#22
05-07-2016, 09:35 AM
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#23
05-07-2016, 11:14 AM
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#24
05-07-2016, 03:16 PM
Grand Champion
#25
05-07-2016, 11:04 PM
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pcm bottom
hope everybody had a bodacious weekend
#26
05-08-2016, 04:05 AM
Grand Champion
I guess I should have been more specific. What I meant was to look into the relay socket terminals from the top side where the relay pokes into it. Sorry about that!
#27
05-08-2016, 06:09 AM
Captain
Trans Relay Wiring
I think it's time to get out the ohmmeter and trace the control wires going to pins 85 and 86 on this worrisome Transmission Relay.
The PINK wire on pin 85 comes from the PCM CONNECTOR 2, PIN 30.
The DARK BLUE wire on PIN 86 comes from the PCM CONNECTOR 3, PIN 25.
However, it first goes to SPLICE 116, wherever that is, where it also connects to the GENERATOR FIELD WINDING. The color of the wire remains DARK BLUE.
I have no idea where this splice is physically located, but I suspect the problem is there. There seems to be a good connection between the Generator Field Winding and the PCM.
Good hunting!
#29
05-08-2016, 08:35 PM
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as a tad opened
That's the PDC, Power Distribution Center, rather than the PCM, Powertrain Control Module. No worries...
I guess I should have been more specific. What I meant was to look into the relay socket terminals from the top side where the relay pokes into it. Sorry about that!
I guess I should have been more specific. What I meant was to look into the relay socket terminals from the top side where the relay pokes into it. Sorry about that!
#30
05-08-2016, 09:26 PM
