Sunday, July 22, 2012

1989 BMW M3 Electrical Troubleshooting Manual


Short Test Using Ohmmeter
Disconennect the battery adjust the ohmmeter to read zero while holding the leads together. Remove the blown fuse and disconnectthe load. Connect one lead of the ohmmeter to the fuse terminal that is closest to the load. Connect the other lead to a known good ground.
Starting near the POWER DISTRIBUTION BOX, move the wire harness back and forth and watch the ohmmeter reading. Low or no resistance indicates a short to ground in the wiring. Infinitely high resistance indicates no short.

CONTENTS
Index
How to use this manual
Wire size conversion chart
Symbols
Systematic Troubleshooting
Connector Views
Power Distribution Box
Fuse Data
Component Location Chart
Component Location Viewa
Splice Location Views
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