HI/LO Freon switch is first or relay stays off line
5.7L V8 GAS OR DIESEL? 2 ARE DIESEL OF 3.
scan the PCM first. p0646?
THE PCM CUTS THE CLUTCH FOR MANY REASONS;
HI/LO SWITCH TRIPPED
CAB BLOWER DEAD
ENGINE OVERHEAT (OR SENSOR FOR THAT TELLING A BIG LIE)
ENGINE OVER LOADED RUNNING WOT.
EVAP CAR ICE UP SENSOR. TRIPPED.
FUSES.
NO SCANNING PCM WE MISS THE BOAT .
WAY TOO COLD OUTSIDE, SENSED.
ENGINE RAD FANS DETECTED DEAD.
CLUTCH IS BAD OR SHORT OR OPEN COIL
RELAY BAD.
THE NEW RELAY SHOWS 5 PINS. SO IS BIG CLUE THERE.
CAB FUSE BOX NOT ENGINE BAY
LEFT SIDE COLUMN OF RELAYS
TO9 LEFT SPARE RELAY,FOG, ASD ,CLUTCH
4 DOWN LEFT
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