Jeep Grand Cherokee WK. Manual — part 258
2. Touch one ohmmeter test lead to the tip of the antenna mast. Touch the other test lead to the antenna cap nut.
Check the ohmmeter reading for continuity.
3. There should be no continuity. If OK, go to Test 2. If not OK, replace the faulty antenna body and cable.
TEST 2
Test 2 checks the antenna conductor components for an open circuit. This test should be performed first on the
entire antenna circuit, from the antenna mast to the center conductor of the coaxial cable connector at the radio. If
an open circuit is detected, each of the three antenna conductor components (antenna mast, antenna body and
primary cable unit, instrument panel antenna secondary cable) should be isolated and tested individually to locate
the exact component that is the source of the open circuit. To begin this test, proceed as follows:
1. Disconnect the instrument panel (secondary) antenna cable coaxial connector from the back of the radio.
2. Touch one ohmmeter test lead to the tip of the antenna mast. Touch the other test lead to the center conductor
pin of the instrument panel antenna cable coaxial connector for the radio. Check the ohmmeter reading for con-
tinuity.
3. There should be continuity. The ohmmeter should register only a fraction of an ohm resistance. High or infinite
resistance indicates a damaged or open antenna conductor. If OK, go to Test 3. If not OK, isolate and test each
of the individual antenna conductor components. Replace only the faulty antenna conductor component.
TEST 3
Test 3 checks the condition of the vehicle body ground connection. To begin this test, proceed as follows:
1. This test must be performed with the battery positive cable disconnected from the battery. Disconnect and isolate
both battery cables, negative cable first.
2. Reconnect the battery negative cable.
3. Touch one ohmmeter test lead to a good clean ground point on the vehicle fender. Touch the other test lead to
the battery negative terminal post. Check the ohmmeter reading for continuity.
4. There should be continuity. The ohmmeter should register less than one ohm resistance. High or infinite resis-
tance indicates a loose, corroded, or damaged connection between the battery negative terminal and the vehicle
body. If OK, go to Test 4. If not OK, check the battery negative cable connection to the vehicle body and the
radio noise suppression ground strap connections to the engine and the vehicle body for being loose or cor-
roded. Clean or tighten these connections as required.
TEST 4
Test 4 checks the condition of the connection between the antenna coaxial cable shield and the vehicle body ground
as follows:
1. Disconnect and isolate the antenna coaxial cable connector under the right end of the instrument panel near the
right cowl side inner panel.
2. Touch one ohmmeter test lead to a good clean ground point on the vehicle fender. Touch the other test lead to
the outer crimp on the antenna coaxial cable connector under the right end of the instrument panel near the right
cowl side inner panel. Check the ohmmeter reading for continuity.
3. There should be continuity. The ohmmeter should register less than one ohm resistance. High or infinite resis-
tance indicates a loose, corroded, or damaged connection between the antenna body and the vehicle body or
between the antenna body and the antenna coaxial cable shield. If not OK, clean the antenna body to fender
mating surfaces and tighten the antenna cap nut to specifications.
4. Check the resistance again with an ohmmeter. If the resistance is still more then one ohm, replace the faulty
antenna body and cable.
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REMOVAL
DOMESTIC
WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, SEAT BELT TENSIONER, SIDE AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MIN-
UTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNO-
SIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE
THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
1. Disconnect and isolate the battery negative cable.
2. Remove the right side cowl trim cover.
3. Remove the glove box.
4. Reach under the instrument panel outboard of the
glove box to access and disconnect the antenna
coaxial cable connector (2). Disconnect the con-
nector by pulling it apart while twisting the metal
connector halves. Do not pull on the cable.
5. Disengage the antenna coaxial cable retainer at
the right cowl side inner panel.
6. Remove the right side wheelhouse splash shield.
7. Unscrew the antenna mast from the antenna body.
8. Remove the antenna cap nut using an antenna nut
wrench (Special Tool C-4816)
9. Remove the antenna adapter from the top of the
fender.
10. Lower the antenna body through the mounting
hole in the top of the fender.
11. Disengage the antenna coaxial cable grommet
from the hole in the right cowl side outer panel.
12. Pull the antenna body and cable out through the
opening between the right cowl side outer panel
and the fender.
WK
AUDIO/VIDEO - SERVICE INFORMATION
8A - 169
EXPORT
WARNING:
DISABLE
THE
AIRBAG
SYSTEM
BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING COLUMN, SEAT BELT TENSIONER,
SIDE AIRBAG, OR INSTRUMENT PANEL COMPO-
NENT DIAGNOSIS OR SERVICE. DISCONNECT
AND
ISOLATE
THE
BATTERY
NEGATIVE
(GROUND) CABLE, THEN WAIT TWO MINUTES
FOR THE AIRBAG SYSTEM CAPACITOR TO DIS-
CHARGE BEFORE PERFORMING FURTHER DIAG-
NOSIS OR SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE
TO TAKE THE PROPER PRECAUTIONS COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
1. Disconnect and isolate the battery negative cable.
2. Remove the assist handles on the right side of the
headliner.
3. Remove the right side visor.
4. Remove the A-pillar trim.
5. Disconnect antenna cable from instrument panel
antenna cable.
6. Lower headliner as necessary to access antenna
cable.
7. Disconnect antenna cable from antenna module.
8. Remove antenna cable from roof panel by pulling
on retaining clips.
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WK
INSTALLATION
DOMESTIC
1. Position the antenna body and cable in the opening
between the right cowl side outer panel and the
fender.
2. Push the antenna coaxial cable into the passenger
compartment through the hole in the right cowl side
outer panel.
3. Engage the antenna coaxial cable grommet in the
hole in the right cowl side outer panel.
4. Position the antenna body through the mounting
hole in the top of the fender.
5. Install the adapter over the antenna body from the
top of the fender.
6. Install and tighten the antenna cap nut using an
antenna nut wrench (Special Tool C-4816).
7. Install and tighten the antenna mast onto the
antenna body. Ensure that the antenna mast is
fully seated on antenna base and that there is
no gap between the mast and base.
8. Engage the antenna coaxial cable retainers at the
right cowl side inner panel and inside the right front
fender.
9. Engage the antenna coaxial cable in the retainer
clips on the lower instrument panel support behind
the glovebox.
10. Reach under the instrument panel outboard of the
glove box to connect the antenna cable (2) to the
instrument panel antenna cable (1).
11. Install the glove box.
12. Install the cowl trim cover.
13. Install the wheelhouse splash shield.
14. Connect the battery negative cable.
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AUDIO/VIDEO - SERVICE INFORMATION
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