2014 Jeep Wrangler JK Factory Service Manual 28 - DTC-Based Diagnostics

B1670-RIGHT TRAILER TOW LAMP CONTROL CIRCUIT HIGH

For a complete wiring diagram, refer to the Wiring Information.






Possible Causes

(L674) RIGHT TRAILER TOW LAMP CONTROL CIRCUIT OPEN
(L674) RIGHT TRAILER TOW LAMP CONTROL CIRCUIT SHORTED TO VOLTAGE
TOTALLY INTEGRATED POWER MODULE

1. TEST FOR INTERMITTENT CONDITION


1. Turn the ignition on.
2. With the scan tool, clear all DTCs
3. Turn on the Right Turn Signal.
4. With the scan tool, read DTCs.


Does the scan tool display active: B1670-RIGHT TRAILER TOW LAMP CONTROL CIRCUIT HIGH?

Yes


No


2. (L674) RIGHT TRAILER TOW LAMP CONTROL CIRCUIT OPEN


1. Turn the ignition off.
2. Disconnect the TIPM C6 harness connector.
3. Disconnect the Right Trailer Tow Lamp harness connectors.
4. Measure the resistance of the (L674) Right Trailer Tow Lamp Control circuit between the Right Trailer Tow Lamp harness connectors and the TIPM C6 harness connector.


Does the Ohm meter read open circuit?

Yes


No


3. (L674) RIGHT TRAILER TOW LAMP CONTROL CIRCUIT SHORTED TO VOLTAGE


1. Turn the ignition on.
2. Measure the voltage on the (L674) Right Trailer Tow Lamp Control circuit.


Is there any voltage present?

Yes


No