We have a '92 3.9l 2wd Dakota that won't start. We don't have any voltage on the dark green/orange wire @ the coil, injectors, pin 57 @ the ecm. We have tried another ecm - same problem. All fuses are fine, there doesn't seem to be any broken wires. Any ideas?
Thanks in advance.
Those are all supliied power by the auto shutdown relay. The relay is suplied power by a fuse.
No, the fuel pump is powered by the fuel pump relay. Both the fuel pump relay and auto shutdown relay are fed by the same fuse and activated by the ECM on a single wire. From what you are saying you have a bad auto shutdown relay or an open wire to the relay.
Shouldn't the
Ignition voltage ??? Not sure what you mean by ignition voltage but the injectors and coil should both have 12 volts. These are powered by the auto shutdown relay.
Did the vehicle ever run after they were changed?
One more thing, what is the battery voltage when cranking?
It is a 12 volt feed wire coming from the shutdown relay. It powers the injectors, coil and ECM.
No.
If I put power to that wire at the coil, the
You need to find out why it has no power on it's own.
Still no start. We have no injector pulse during
You may have a wiring harness problem, I would fix the no power from the auto shutdown relay first.
The ecm originally called
Did the engine ever run at all ??? If yes was it before or after the cam and crank sensors were replaced ?
To Mike and TBone: Thanks for your help.
What turned out to be the problem ??
There is a broken pin within the distributor. It hasn't been repaired yet but, it looks like the right direction. I'll keep you posted. Thanks again.
your are welcome and good luck.
Have something to add? Share your thoughts — no account required.
Ask the community — no account required