Grand Cherokee 2WD L6-4.0L VIN S (1997)
Antenna Relay: Testing and Inspection
SYSTEM OPERATION
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIR BAGS AND SEAT BELTS/AIR BAGS BEFORE
ATTEMPTING STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE.
FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
1. Remove the antenna relay from the junction block as described. Go to Step 2.
2. Check for continuity between the relay ground circuit cavity in the junction block and a known good ground. There should be continuity. If OK, go
to Step 3. If not OK, repair the open circuit as required.
3. Check for battery voltage at the relay fused E(+) circuit cavity in the junction block. If OK, go to Step 4. If not OK, repair the open circuit to the
fuse in the junction block as required.
4. Turn the ignition switch to the On position. Check for battery voltage at the relay radio 12 volt output circuit cavity in the junction block. There
should be voltage with the radio turned on, and no voltage with the radio turned off. If OK, replace the faulty relay. If not OK, repair the open
circuit to the radio as required.