'00 Ram 2500 Died While Driving
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Amateur
Joined: Jun 2016
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Just out of idle curiosity..... Lets refresh my memory here a bit:
Does the fuel pump prime?
Do your gauges do anything when the ignition is on? (gas gauge read right, etc.)
Do you get power at the coil, or injectors, for a few seconds when the fuel pump primes? (if it does....)
You have power at all the right spots. Could check and see if you are getting 5 volts TO the crank sensor...... just to be sure.
Does the fuel pump prime?
Do your gauges do anything when the ignition is on? (gas gauge read right, etc.)
Do you get power at the coil, or injectors, for a few seconds when the fuel pump primes? (if it does....)
You have power at all the right spots. Could check and see if you are getting 5 volts TO the crank sensor...... just to be sure.
Gauges work, except fuel gauge for some reason. There isnt a ton of gas in the truck but the needle doesnt move. Ses light, brake light, abs light all illuminate
Thread Starter
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Amateur
Joined: Jun 2016
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Whats the proper way to bypass it? Jumper wire or paperclip? If the truck starts then what does this signify? Bad ASD relay? Ive already swapped that relay out
Administrator
Joined: Apr 2010
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From: Clayton MI
I wonder if the PCM simply is not controlling the relay. Since you tried with a known good relay, and it didn't work, if the jumper works, that implies the PCM. Paperclip will work, but, a short piece of wire would be better. It's just a test, not like you are going to drive it like that. 
Thread Starter
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Amateur
Joined: Jun 2016
Posts: 35
Likes: 0
I wonder if the PCM simply is not controlling the relay. Since you tried with a known good relay, and it didn't work, if the jumper works, that implies the PCM. Paperclip will work, but, a short piece of wire would be better. It's just a test, not like you are going to drive it like that.
Captain
Joined: Apr 2016
Posts: 647
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From: Alabama
Now this is gettin' fun! I love chasin' electrons!
HeyYou: What do you think about using a test light to ground the control side of the ASD relay to get power to the coil and injectors?
The bypass works, but test light's good for momentary test.
Also, 2 other 12 volt inputs to the PCM. C1-22 is hot all the time, but:
C1-2 is 12 volts from IGN-RUN/START.
C3-12 is ASD relay output ( same as to coil and injectors.
HeyYou: What do you think about using a test light to ground the control side of the ASD relay to get power to the coil and injectors?
The bypass works, but test light's good for momentary test.
Also, 2 other 12 volt inputs to the PCM. C1-22 is hot all the time, but:
C1-2 is 12 volts from IGN-RUN/START.
C3-12 is ASD relay output ( same as to coil and injectors.
Last edited by Friar Tuck; Jun 25, 2016 at 10:42 PM. Reason: HeyYou question