Fleetwood V8-368 6.0L VIN 9 FI (1982)
To check the compressor clutch and circuit:
Disconnect the power module 2-way connector.
Jumper circuit 204 (pin A of the power module 2-way connector) to ground through a 5 amp in-line fuse. If the fuse does not blow within two
minutes, the compressor clutch did not cause the power module failure (proceed to "Check the blower motor circuit").
If the 5 amp fuse blows, remove the compressor clutch coil connector and check the clutch diode using the diode check setting on a DVOM.
If the diode checks bad, replace the diode.
Check voltage to ground and resistance to ground on circuit 204 with the power module and compressor clutch coil disconnected and the
ignition in the run position using a DVOM. A voltage reading over .1 volt indicates there is a short to voltage on circuit 204 which should be
repaired. If a short to ground is found on circuit 204, this should be repaired. If circuit 204 checks ok, replace the compressor clutch coil.
To check the blower motor circuit:
Disconnect 4-way power module connector. Select 60~ AUTO ECC setting.
Connect an ammeter with greater than 25 amp capacity between the blower feed terminal pin A and a 12 volt source. This will turn the
blower on full and give a blower motor draw reading. If an ammeter with 25 amp capacity is unavailable, substitute a 20 amp in-line for the
ammeter and use heavy gage jumpers from circuit 65 to the in-line fuse and from the in-line fuse to a 12 volt source.
If an ammeter is used:
The amp draw after one minute (steady-state blower motor draw) should not exceed 20 amps. If blower motor draw exceeds this parameter,
it should be replaced. If an in-line fuse is used:
The 20 amp fuse should not blow after five minutes of blower operation. If the fuse blows at any time during the five minute test period,
replace the blower motor.
After completing all diagnosis, replace the power module.
When checking the blower motor draw if a 25 amp ammeter is not available, a 20 amp fuse may be substituted for the ammeter. The substitution
of a 20 amp fuse is preferable to the use of an ammeter with a 100 amp or greater full scale reading. If a 20 amp fuse is substituted for an
ammeter in the blower motor draw test, a blown fuse would indicate failure of the test.