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Q: Where is the neutral safety switch located on an 02 Ram 1500 on 2002 Dodge Ram 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
shifter will not move from park
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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The neutral safety switch has nothing to do with the shift interlock system.


Customer Concern:
Cannot shift out of the park position. The Center High Mounted Stop Light (CHMSL) is not working. The outer brake lights work if the ignition switch is on.
Tests/Procedures:
1. Check if fuse #24 in the TIPM (Totally Intergrated Power Module) is good.

2. Check that the Tan/Red wire at the brake switch has power at all times. Load test this circuit using a spare headlight.

3. Check that there is B+ on the White/Tan wire at the brake switch when the brakes are applied. If not, the switch is bad.

4. The instrument cluster sends out B+ on the Orange/White wire to the BTSI solenoid when the brakes are released. The cluster gets voltage on the White/Tan wire when the brakes are applied and stops sending voltage to the BTSI to release the shifter. The White/Tan wire also goes to the CHMSL.
Tech Tips:
The outer brake lights get power from the TIPM. The TIPM gets a bussed message from the cluster when the brake pedal is applied. If the cluster does not get power on the White/Tan wire but the Powertrain Control Module (PCM) and Controller Antilock Brakes (CAB) get a signal that the brakes are applied, one of the modules sends a bussed message to the TIPM as a failsafe. This failsafe only works when the key is turned on.
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