Join Date: Apr 2008
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Interesting issues - e4od solenoid, starter solenoid, etc
Howdy, folks. I'm hoping some one might be able to enlighten me on some issues I am having with my '89 E350 (school bus) with an E4OD tranny...
I parked the rig for a few days and my batteries died, and I mean really died (3.9 volts). I jumped the rig, drove a bit, and charged the batts. Using a multimeter I traced a power drain from the batteries to a wire that comes off the hot side of the starter solenoid. It was pulling 1.4 amps (when the bus is off). When disconnecting and reconnecting the wire I heard a clicking noise that I traced back to the transmission solenoid. With a friend tapping the wire, I pulled the solenoid connector off the transmission and immediately the clicking stopped. So I know that the power is coming to the solenoid from that wiring harness.
When I looked a the connector it was moist (seemed like water, not tranny fluid). I've cleaned the connector and where it plugs in. Still it is drawing power.
Next, I tried to start the bus. Glow plugs cycled, but nothing happened when I turned the key. I had to go under the rig and jump it with as pair of pliers. It ran fine, and I let it for half an hour, but there was flashing of the OD light (which means tranny problem).
I've never been about to pull codes from this baby. I've tried with and OBD tool and a multimeter. Just never had any signal come through.
I had a new starter relay on hand because I thought it was going out six months ago (bus wouldn't start, so I jumped it with pliers, but then never had an issue again). So I put it in today. Still wouldn't start with the key, and now the glow plugs don't even cycle. I switched back to the old relay and the glow plugs wouldn't cycle with that one now either. So I put the new one back in.
I can jump the starter either at the starter, or at the relay (by putting 12v to the ignition signal).
I tested the ignition signal at the starter relay and there is no signal when I try to start.
So, to sum it up: Tranny solenoid stays on, which drains battery... Now glow plugs wont cycle, and it wont turn over. No signal to the starter relay from the ignition.
Possible problems: EEC is acting up and telling the tranny solenoid to stay on. Ignition switch is out. Fusible link burt out (where? what does this look like?). Moisture on the tranny solenoid is crossing signals. What do y'all think?