Chrysler Repair: 89 chry voyager running rough, chrysler voyager, voyager 3

Question
hello
i would very much appriciate the help my problem is on my 89 chrysler voyager 3.0L has been running rough i recently performed a major tune up on it cap,rotor,plugs,fuel,oil filters,trans filter,front and rear shocks,rack and pinion,imput shaft and shortly after that it started to run rough so i scanned the computer for codes and came up with a code 42 auto shutdown relay open or short. i have been trying to locate the problem and just cant seem to find it so if you can help me out with some info as to how to repair or diagnose the problem it would be much appriciated. email me if you need more info please

Answer
The ASD relay is responsible for providing power for the coil and fuel pump so naturally when there is a problem with it's circuitry then you could have a rough running or a no start condition.  This relay is mounted on the left (Driver's) fender closest to the strut tower.

Sometimes relays of this design will fail.  They shouldn't be too terribly expensive and you might want to start with a new one and see what that does for you.

In the mean time you will also want to look at the wiring underneath of your battery tray.  There's several major connectors that go to your engine and if there's battery acid dripping or the harness is partially damaged already from previous corrossion or leakage then you will need to start with a new harness before proceding with additional diagnostics.
Doug