mfpdm Posted November 20, 2009 Share Posted November 20, 2009 Well this topic comes up quite a bit on here so I figured I'd write it down and hopefully simplify it for some.Common swap for a lot of us is to use a donor XJ when upgrading from a 4 banger or when replacing a corroded fuse panel. Only thing is, the XJ's dash to rear harness is not a plug n play affair for the MJ's. I've pinned out all the plugs on both and made a simple chart so you can see which wires go where.Here's the pin outs for the XJ dash harness connectors.(Renix Era)Connector C118 (Black)1 Park Brake Switch (Gray/Red)2 Interior lamps (Pink)3 Stop lamps (Light Blue/Black)4 Rear park/marker/license lamps (Dark Blue)5 RH rear turn lamp (Brown)6 Fuel sending unit (Tan)7 Backup lamps (Brown/White)8 Door jam switch (Black/White)9 LH rear turn lamp (Gray/Black)10 Seatbelt switch (White)Connector C119 (Gray)1 Speaker right rear return (Black)2 Speaker right rear feed (White/Black)3 Center console lamps (Orange/Black)4 Rear wiper relay (Green/White)5 **Wagoneer stop lamps** (Light Green/Black)6 Speaker left rear return (Brown/White)7 Speaker left rear feed (Green/White)8 Defogger grid (Brown/White)9 Rear wiper (Yellow/Black)10 Fuel pump (Pink/Black)Pin outs for the MJ rear harness connectors.(Renix Era)Connector C1181 Speaker right rear return (Brown)2 Speaker right rear feed (White/Blacke)3 Center console lamps (Orange/Black)4 Ground G102 (Black)5 B-pillar lights (Pink)6 Speaker left rear return (Brown/White)7 Speaker left rear feed (Green/White)8 Cargo lamp (Pink/White)9 Door switch (Black/White)10 Seatbelt switch (White)Connector C157A RH stop/turn lamp (Brown)B Side marker/park/tail/license (Dark Blue)C Fuel sender unit (Tan)D Backup lamps (Brown/White)E LH rear stop/turn lamp (Gray/Black)F Fuel pump (orange)Table for Renix XJ dash harness and Renix MJ harness.* Pin 4 on MJ C118 is G102. This ground should be connected under the dash with the one already there under the light switch.** Pin 8 on MJ C118 is for the cargo light. No direct XJ match.# Pin 3 on XJ C118 connects to pin 5 on XJ C119. This will provide proper wiring for the brake lights.+ Pin 1 on XJ C118 needs to be attached to the E-brake switch" Pin 4,8, and 9 on XJ C119 are not needed.NOTE: Some wire colors may have changed a little but the pin number should be the same function. Also, when a wire passes through a connector, it sometimes, adds a tracer but should be the same main colorHere is the pin outs for the HO harness. (Thanks to Boilermaker's post here: viewtopic.php?f=2&t=10143)92 XJ Gray body connector (wire colors in parentheses): pin 1 (db/or) Speaker return right rearpin 2 (db/wt) Speaker feed right rearpin 3 (or/bk) panel illuminationpin 4 (bk) groundpin 5 (pk) courtesy lampspin 6 (br/lb) speaker return left rearpin 7 (br/yl) speaker feed left rearpin 8pin 9 (yl) switched groundpin 10 (lg) seat belt switchpin 11 (br/rd) rear wiper runpin 12 (wt) rear wiper parkpin 13 (or/vt) lock relaypin 14 (pk/wt) unlock relaypin 15 (vt/yl) security alarm liftgatepin 16 (pk/or) keyless arm input92 XJ Black body connector (wire colors in parentheses):pin 1 (dg/tn) Fuel Pumppin 2 (tn/dg) Right Rear Turn Signalpin 3 (db/rd) Parking Lampspin 3 (db/rd) Parking Lampspin 4 (db) Fuel Gaugepin 5 (br/lg) Backup Lamp Signalpin 6 (lg/bk) Left Rear Turn Signalpin 7 (gy/or) Brake Pressure Warning SW/ Park Brake Lightpin 7 (gn) Brake Pressure Warning Switchpin 8 (bk/rd) Rear Defoggerpin 9pin 10 (bk/wt) Rear Washer Feedpin 11 (wt/tn) Stop Lampspin 11 (wt/tn) Stop Lampspin 12pin 13pin 14pin 15 (db/or) Illuminated Entry Signalpin 15 (dg/or) Right front door securitypin 16 (lg/or) Left front door securityTable for a HO dash harness and MJ (Renix Era) rear harness.+ Pin 7 on XJ Black connector needs to be attached to the E-brake switch.* Pin 11 on XJ Black connector, need to run a wire to pin P on the turn signal/hazard switch.(11 pin flat connector on lower steering column) This will provide proper wiring for the brake lights.** If you have a cargo light, you'll have to run a wire from the switch to pin 8 on MJ C118.NOTE: Some wire colors may have changed a little but the pin number should be the same function. Also, when a wire passes through a connector, it sometimes, adds a tracer but should be the same main colorYou can accomplish the wiring a couple of different ways. Cut and splice the wires. Down side to this is if you have to replace either harness, you'll have to cut and splice all over again. Or, you can make a pigtail using the old harnesses connectors. This method allows for a plug n play swap later if you have to replace either harness or if you go back to all MJ specific ones. The later of the two is what I did. Here's a couple of pics.I pulled the two rear connectors from my donor XJ and the two dash connectors from my 2.5 L MJ dash harness. I then used the Troubleshooting wiring guides for the MJ and XJ to pin them out and label them.XJ'sMJ'sAs you can see, I labeled both sides with what it was and where it should go. It was a little time consuming but save me from going back and forth to the paper I put the pin outs on and was a good way to double check everything. I then laid them all out and just taped the ends together so I could test fit it in the truck to make sure I had enough wire or to cut out if it was too much.Out came the helping hands and soldering iron.I stripped the wires and tin then with solder.WARNING: Make sure you put the shink tube on before you connect the wire ends together.Then using a couple of pair of needle nose pliers, I held the wires together with one and twisted them together with the other.Used my helper and then soldered them together and put the shrink tube over and shrunk them.Once I had all the soldering done I taped the harness up and here is what I have.Here's what everything is.I'm using the rear defogger from the XJ to run my LED cargo lights that will be installed later under my bedrails. Since I'm using that circuit, I'll never have to worry about them being left on as that circuit is a timed circuit and only stays on for about 15 mins.Here is the pigtail installed in the truck.All the connectors except one is tucked up above the e-brake which was a necessity for me having all the power options for the doors. This will allow me to get the kick panel on and have the e-brake function as it should.NOTE: I have not done an HO harness, just the table above. I used the pin outs and put them where they should go.Hopefully this will ease some of the frustration of doing your wiring project. I will post some helpful wiring diagrams later if I can get my scanner working. :cheers: Quote Link to comment Share on other sites More sharing options...
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