My 90 B350 5.9 died while the wife was driving it. The 18 gage hypalon wire (which I had replaced at GREAT EXPENSE) was smoking so I changed the relay and the wire. The engine rotates but won't start and the new wire gets hot in seconds. What is causing this to happen?
wreckrunner
Dodgevanman
11-18-2006, 07:15 PM
How many fusible links do you have? Need to know which circuit this link is protecting before we dive into a diagnosis. But it sounds like a dead short somewhere.
wreckrunner
11-19-2006, 08:34 AM
The link in question is tied in with an unknown relay. I call it unknown because in the Hayes manual it appears to be the Auto Shutdown Relay but, the Auto Parts stores do not have a listing for it (I got a new one by taking the old one to NAPA). I blew that link the first time by foolishly mistaking that relay for the starter relay (which is connivently located behind the Master Cylinder Booster) and performed the diagnostic which grounded the wrong thing and blew the link. I had to get new ones from Mopar and the four links I got cost me $24 so, now that I am down to one left I would really like to find out why its blowing before I set the last one.
The Hayes manual (which is somewhat accurate) calls for a fuel pump relay also but does not show where it is. Is there really one on this vehicle or is it also a mistake as was their calling for an ignition module which did not exist?
Thanks for the help,
wreckrunner
Dodgevanman
11-19-2006, 08:47 AM
The ASD Relay is located directly below the main bulkhead connector. The ASD Relay supplies power to the fuel pump, injectors, coil, and O2 sensor. The ECM activates the ASD Relay by controlling the relay's ground circuit.
There is no seperate fuel pump relay.
To the right of the ASD relay are two other relays, the starter relay and above that is the "Part Throttle Unlock" Relay (don't know what that does). To the right and above those two relays is the A/C Clutch relay.
wreckrunner
11-19-2006, 10:23 AM
So what do you think is cooking the link?
Dodgevanman
11-20-2006, 06:48 AM
Would be hard to pinpoint the problem exactly, but I wouldn't rule out a dead short somewhere in the steering column or ignition switch. That's certainly possible.
car54
11-25-2006, 07:06 AM
Check the resistance to ground from the link to the load.
