RAM 2500 Truck 4WD V10-8.0L VIN W (1997)
Power Door Lock Switch: Description and Operation
SYSTEM OPERATION
The power locks are controlled by a two-way switch mounted in a bezel on the trim panel of each front door. On models without the Remote
Keyless Entry (RKE) option, the switch controls both the battery and ground feeds to the power lock motors. The battery and ground feeds are
reversed between the Lock and Unlock switch positions.
On models with the RKE option, the power lock switch controls the battery feeds to the lock and unlock terminals of the power lock and remote
keyless entry module. The power lock and remote keyless entry module then relays the correct battery and ground feeds to the power lock motors.
The power lock switches cannot be repaired and, if faulty or damaged, the entire switch must be replaced.
CIRCUIT OPERATION
Left Door Switch Operation (Lock)
When the door lock switch is moved to the LOCK position, voltage is supplied on the P35 circuit to the bus bar located inside the right door
switch, LOCK side. Battery voltage is passed through the switch to the door motors on circuit P33. Grounding is provided through the P34 circuit
for both door motors back to the right door switch. The ground is passed through the bus bar internal to the switch, UNLOCK side, to the P36
circuit. The P36 circuit connects to the left front switch to a bus bar, internal to the switch, and then to the Z3 circuit. The Z3 circuit provides
ground.
Left Door Switch Operation (Unlock)
When the switch is moved to the UNLOCK position, voltage is supplied on the P36 circuit to the right door switch, UNLOCK side. The battery
voltage is passed through the switch internal bus bar to the P34 circuit. The P34 circuit then connects to the door motors on the UNLOCK side.
Grounding for the UNLOCK function is provided by the P33 circuit.
The P33 circuit connects back to the right door switch, LOCK side, and passes through the internal bus bar to the P35 circuit. The P35 circuit
connects back to the left door switch, and passes through the switch to ground on circuit Z3.
Right Door Switch Operation (Lock)
When the switch is moved to the LOCK position, voltage is supplied to the P33 circuit, and then to the door lock motors. The ground path is
provided on the P34 circuit back to the right door switch. The ground is passed through the switch internal bus bar to the P36 circuit. The P36
circuit connects to the left door switch and through to ground on circuit Z3.
Right Door Switch Operation (Unlock)
When the switch is moved to the UNLOCK position voltage is supplied to the P34 circuit from the switch to the door UNLOCK side of the
motors. The grounding path is through the LOCK side of the motors, circuit P33, back to the switch. The ground continues through the internal
bus bar of the switch on circuit P35 to the left door switch. At the left door switch, the ground passes through that switches internal bus bar to
ground on circuit Z3.
