Just changed the headgasket on our 95 E320. Car is running great and no leaks, but now the climate control and reverse lights don't work (16A red fuse, maybe #7, blows as soon as the key switch is turned to ignition.) The heat definitely worked the day before we started the job...so I'm thinking its a harness issue from moving it a bit. I didn't remove it from the car, just unplugged everything necessary and moved it out of the way. You can see the larger plug on top of the water pump that runs the two electric fans in the grill has cracked insulation and some has come off completely where the actual wires are exposed near the plug. However, nothing appears to actually be touching. A few inches back in the harness you can see cracking of the insulation but no insulation has come off because the black cloth wrap holds everything tightly in place. Everything else in the car works fine. Rather than shell out for a new harness, (this is our 4th car) how can I find and fix this problem? Basically, how can I find which of the circuits on fuse #7 is actually causing the short? Anybody got electrical diagrams?

Thanks

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2002 Mercedes-Benz E320 4Matic
1995 Mercedes-Benz E320 Wagon
2005 Land Rover LR3 V8 SE
1999 Audi A8 4.2L quattro