all my gauges stopped working
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
Ok so I checked connector c1 pins 8&9 for power 8 didn't have power fuse 9 was blown. Replaced fuse and now has power. I have my dash indicator lights working again but still no gauges. I'm gonna have to start testing pcm. Its raining again so gonna have to wait it out. Its been raining a lot lately and problem started after heavy rainstorm. I wonder if somethings building up a lot of moisture???
Make very sure that C2 pins and the pin sockets 1 & 2 are not corroded (gray or black appearance) and that the pin sockets are not enlarged from people shoving probes into them. Same with C1 pin sockets 8 & 9.
With everything reassembled, check voltages at the DLC one more time. Pin socket 3 to 4 or 5, and 11 to 4 or 5 (Key to RUN).
Check the termination resistors in the PCM by disconnecting the battery negative cable, then using an Ohmmeter, read between DLC pin sockets 3 and 11. You should see 120 Ohms. If not you'll need to start checking wires.
Tip concernng fuse 9 in the JB and fuse 16 in the PDC: I recommend using those mini fuses that light up when the fuse blows. O'reilly carries these fuses. They come in handy when troubleshooting problems like yours. Keeps you from constantly pulling the fuses and eyeballing them to see if they're blown.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
C1 pins 8 & 9 are the two main power feeds to the Instrument Cluster. There's no need to start chasing other fuses. If you probed C1 pin 6 as the meter ground, it shows the ground at G108 is good; you didn't mention, however, if you checked continuity of C2 pin 9 like I mentioned.
Make very sure that C2 pins and the pin sockets 1 & 2 are not corroded (gray or black appearance) and that the pin sockets are not enlarged from people shoving probes into them. Same with C1 pin sockets 8 & 9.
With everything reassembled, check voltages at the DLC one more time. Pin socket 3 to 4 or 5, and 11 to 4 or 5 (Key to RUN).
Check the termination resistors in the PCM by disconnecting the battery negative cable, then using an Ohmmeter, read between DLC pin sockets 3 and 11. You should see 120 Ohms. If not you'll need to start checking wires.
Tip concernng fuse 9 in the JB and fuse 16 in the PDC: I recommend using those mini fuses that light up when the fuse blows. O'reilly carries these fuses. They come in handy when troubleshooting problems like yours. Keeps you from constantly pulling the fuses and eyeballing them to see if they're blown.
Make very sure that C2 pins and the pin sockets 1 & 2 are not corroded (gray or black appearance) and that the pin sockets are not enlarged from people shoving probes into them. Same with C1 pin sockets 8 & 9.
With everything reassembled, check voltages at the DLC one more time. Pin socket 3 to 4 or 5, and 11 to 4 or 5 (Key to RUN).
Check the termination resistors in the PCM by disconnecting the battery negative cable, then using an Ohmmeter, read between DLC pin sockets 3 and 11. You should see 120 Ohms. If not you'll need to start checking wires.
Tip concernng fuse 9 in the JB and fuse 16 in the PDC: I recommend using those mini fuses that light up when the fuse blows. O'reilly carries these fuses. They come in handy when troubleshooting problems like yours. Keeps you from constantly pulling the fuses and eyeballing them to see if they're blown.
Thread Starter
Member
Joined: Jul 2011
Posts: 204
Likes: 1
From: il
Year: 2001
Model: Cherokee
Engine: 4.0
C1 pin 6 and c2 pin 9 have continuity. I checked by touching firewall to each pin. Ill have to check pcm ohms tomorrow. Weather supposed to be nicer tomorrow so ill really have to dig in.
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
6 is instrument cluster lights (amongst others) off the Headllamp switch.
16 is the Right Headlamp off the Headlamp Beam Select Switch.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
According to link I posted 16 on interior fuse panel is related to instrument cluster ....are any other fuses not showing power theres been cases where interior fuse pane has corroded circuit boards causing electrical isssues.
Last edited by freegdr; Apr 14, 2013 at 03:23 AM.
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
Fuse 16 in the JB is for the Right Headlamp, off the Headlamp Beam Select Switch.
He already checked the JB and it looks okay.
Thread Starter
Member
Joined: Jul 2011
Posts: 204
Likes: 1
From: il
Year: 2001
Model: Cherokee
Engine: 4.0
I had jeep running and tried wiggling pcm connector and nothing. Disconnected neg battery cable and checked ohms at dlc while wiggling pcm connector and still only 60 ohms. What's next? This is driving me crazy.
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0



