TROUBLESHOOTING THE M998 ELECT SYST. - OD1617 - LESSON 1/TASK 1
HEATER SYSTEM SCHEMATIC.
Step 3. Disconnect lead 27D from the heater fan switch and, using a
multimeter, check for battery voltage at lead 27D.
voltage is present, go to step 4.
If voltage is not present,
voltage. If battery voltage is not present, replace the body wiring
harness, following the procedures contained in paragraph 4-62 of the
If the wiring harness cannot be repaired, notify IDS
If battery voltage is present, continuity check the
breaker, following the procedures contained in paragraph 4-9 of the