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2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Normal. Voltage to pin 85 is supplied via the ignition switch. PCM controls ground side of the circuit.
Should be able to just unplug the connector, stick your probe into the appropriate hole, ground the other one, and see what you get. (ignition off.) Should be an open circuit. (leave the relay out too.)
Then you have a short to ground on that wire. It might be under the PDC..... Gonna have to physically trace the wire end to end, and find the short.
alrighty I’ll start over and report back shortly. Luckily I have nothing better to do today LoL.
its really hard to lift the PDC cause the wires under it I was afraid that if I did lift it too much I would ya k someThing out of place. But tha probably where it is.
Should be infinite..... Any resistance aside from some stupid high number is bad news.
On the other pins from the pcm connector when I test them it give various readings from 13 to 85ish depending on the pin. and some don’t change from the initial 1 .
but the pin19 gives the 85 ohm consistently
so does that still confirm a short? Should only the pump relay give an infinite reading?
Last edited by Packwood Digital; Aug 23, 2020 at 03:56 PM.
Hmm if you're measuring 0.6 ohms at pin 85 in the relay socket you should measure the same at the connector end of the wire. In any case 0.6 ohms at the relay socket with the connector disconnected at the PCM is clearly a short to ground somewhere.