Jtrux Posted April 2, 2016 Share Posted April 2, 2016 I was troubleshooting some issues I am having and started tracing wires via an ohm meter going to the MAP sensor. According to my manual, the violet wire (center wire labeled "B") should have 5 volts when the ignition is in the ON position but mine had none. I hooked an ohm meter to it and determined that it was grounded. I traced it back to the plug and unplugged it. This is what i found. This looks like a mess. Is this in any way normal? Link to comment Share on other sites More sharing options...
HOrnbrod Posted April 2, 2016 Share Posted April 2, 2016 Pretty much normal. Link to comment Share on other sites More sharing options...
tugalo Posted April 2, 2016 Share Posted April 2, 2016 Normal; and your fuse block is full of the same stuff. Some kind of anti-corrosive compound. Grab a tooth brush, a bunch of rags, and solvent of your choice. Scrub and rub till most of it is gone. Pinch together the female side of each contact, re-mate the two halves of the connector and see if your problem has been resolved. your fuse block has the same screw in the center of the connector on the fire wall side. Link to comment Share on other sites More sharing options...
Marine1Texas Posted April 2, 2016 Share Posted April 2, 2016 I found out wiring direct and junking the c101 works best. Takes a bit to do, but you never have to worry about the loose or bad connections in the c101 again. use the nice shrink wrapped connectors so after crimp you shrink them down so no moister can get in. Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted April 3, 2016 Share Posted April 3, 2016 27. C101 connector elimination Unbolt the 2 halves of the C101 using a ¼” socket. On each half there is a plastic cover where the wires enter. They are removable but you'll probably end up busting them off. Lightly bolt the C101 back together, away from the firewall. Peel back the split-loom covering from the body side of the C101 connector down to where the harness splits and goes toward the firewall, pretty much below the MAP sensor. On the engine side, remove the split loom about the same distance. See first photo. Now you can see from one side of the C101 to the other. Beginning at the top row, closest to the motor, be absolutely sure you cut the matching wires on each side of the connector off to about 1/2 inch. This will allow you to verify the original position of each wire color in case of mistakes or confusion. CUT AND SOLDER ONE PAIR AT A TIME. The wires may be wound a bit in their looms. See the first photo. Get them unwound neatly and do the following, ONE AT A TIME. Slide your shrink tube over one wire. In a well ventilated area, solder the wires together and then slide the shrink tubing over the solder joint. Heat the shrink tubing so it seals your completed solder joint. Keep going until you've done all 22 or so connections. Both sides of the C101 connection have a wire that is brown with white tracer. Follow each of these wires back until you come to a point where three wires are crimped together. See the second photo. What you want to do here is cut the crappy factory crimp out of each set of three and bring both sets of three wires together and solder them together, using shrink tubing as well. All 6 wires. These particular wires will not end up in your normal C101 elimination loom. See the third photo. After all the soldering and shrink tubing is done, bundle the wires together in a new piece of 3/4" split loom. Tape it up and secure it to the C101 connector's original bolt hole or somewhere else along the firewall so it will be protected. See the third photo. Revised 03-06-14 Link to comment Share on other sites More sharing options...
Jtrux Posted April 3, 2016 Author Share Posted April 3, 2016 Excellent. Thank you. Link to comment Share on other sites More sharing options...
cruiser54 Posted April 4, 2016 Share Posted April 4, 2016 Excellent. Thank you. While you're at it, click on my link below and do Tips 1,3,4, and 5. Link to comment Share on other sites More sharing options...
Jtrux Posted April 4, 2016 Author Share Posted April 4, 2016 Will do. Link to comment Share on other sites More sharing options...
cruiser54 Posted April 5, 2016 Share Posted April 5, 2016 Keep us inform Will do. Keep us informed please. Link to comment Share on other sites More sharing options...
DirtyComanche Posted April 5, 2016 Share Posted April 5, 2016 Does anyone know what that black stuff they used on the factory connectors is? It honestly seems to work pretty well. I'm not exclusively a jeep guy, and I actually find the Jeep electronics hold up better than many of the other brands... Link to comment Share on other sites More sharing options...
cruiser54 Posted April 5, 2016 Share Posted April 5, 2016 Does anyone know what that black stuff they used on the factory connectors is? It honestly seems to work pretty well. I'm not exclusively a jeep guy, and I actually find the Jeep electronics hold up better than many of the other brands... Looks like some military spec stuff I've seen on their trucks. Marfac? Link to comment Share on other sites More sharing options...
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