No WTS or rpm
#16
12-05-2015, 10:26 AM
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The other is the fuel restriction sensor wire. You don't need those, so it is fine that you cut them out. You do need to make sure the one that goes to the fuel bowl heater is isolated and not touching anything. I think it is the green wire with red stripe. If you have no wait to start light, and you are 100% certain that fuses are all good, then start looking at all the grounds that connect around the fenders and core support. If those are all clean and connected good, then take the two small wires off the GPR and tape the ends up so they don't touch anything. See if you then get a WTS light. If not, you may have a bad PCM. If you know anyone that has a truck like yours, put your PCM in their truck and see if it works. Always remember to disconnect the batteries when removing and installing a PCM.
I have 12v constant going to the GPR but nothing coming out the other side of the GPR
#18
12-05-2015, 05:18 PM
If you have 12 volts on the small wire of the GPR (RED/LtGrn) then fuse #22 is OK. The question is do you have power to the PCM.
Power distribution is as follows ...
Fuse 22 -> PCM Power Diode -> PCM Relay coil.
Check the PCM Diode and Relay. I have never personally saw the actual diode or relay fail but if you had it at a service shop, who knows. You can swap the PCM relay with the horn relay as a test. The diode you can measure with a ohm meter.
If all that checks out then fuse 9 supplies power to the PCM relay contacts which powers up the PCM, IDM relay and IPR. Check fuse 9 really really good as if it blown due to shorted wires you will get the symptoms you are describing.
Power distribution is as follows ...
Fuse 22 -> PCM Power Diode -> PCM Relay coil.
Check the PCM Diode and Relay. I have never personally saw the actual diode or relay fail but if you had it at a service shop, who knows. You can swap the PCM relay with the horn relay as a test. The diode you can measure with a ohm meter.
If all that checks out then fuse 9 supplies power to the PCM relay contacts which powers up the PCM, IDM relay and IPR. Check fuse 9 really really good as if it blown due to shorted wires you will get the symptoms you are describing.
#19
12-05-2015, 09:56 PM
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I found a big burned out spot inside the PCM. I replaced the PCM with another one from the same year truck now the WTS light sort of works. The WTS light flickers as the GP relay in the underhood fuse panel makes a chattering noise similar to the sound hen you have a bad battery connection and you turn the key starter solenoid makes a chattering noise. when I take one of the small wires off the GPR the chattering relay stops and so does the check engine light.are the little wires on the GPR supposed to be on the same terminal or separate terminals ? The mechanic I had decided to put them on one side
#20
12-05-2015, 10:04 PM
I found a big burned out spot inside the PCM. I replaced the PCM with another one from the same year truck now the WTS light sort of works. The WTS light flickers as the GP relay in the underhood fuse panel makes a chattering noise similar to the sound hen you have a bad battery connection and you turn the key starter solenoid makes a chattering noise. when I take one of the small wires off the GPR the chattering relay stops and so does the check engine light.are the little wires on the GPR supposed to be on the same terminal or separate terminals ? The mechanic I had decided to put them on one side
#21
12-05-2015, 11:16 PM
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#22
12-06-2015, 07:48 AM
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I found a big burned out spot inside the PCM. I replaced the PCM with another one from the same year truck now the WTS light sort of works. The WTS light flickers as the GP relay in the underhood fuse panel makes a chattering noise similar to the sound hen you have a bad battery connection and you turn the key starter solenoid makes a chattering noise. when I take one of the small wires off the GPR the chattering relay stops and so does the check engine light.are the little wires on the GPR supposed to be on the same terminal or separate terminals ? The mechanic I had decided to put them on one side
#25
12-07-2015, 04:33 AM
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Changed out the relay thats not chattering/clicking anymore,however the light is still flickering and the GPR is clicking/chattering.I changed the GPR out with an extra one I had and it still does it quietly.WTH ? Never seen anything like it.connections are tight and the batteries have a full charge
#26
12-07-2015, 12:42 PM
#28
12-09-2015, 05:20 AM
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#29
12-09-2015, 06:40 PM
