Jeep Wrangler Forums. TJ Wrangler Technical Forum TJ instrument panel wiring pin outs. Unless you've modified the stock pump wiring, the sender already has a ground via the PCM (K167 circuit, BR/YL, at C1 pin A4) -- and don't even think about tapping into that specific ground wire unless you want your other engine sensors to go haywire.. I have a 1998 wrangler and having this ecu pulse issue, I have bought this ecu but mechanic can not seems to connect everything as it should using the ecu pins, he needs a wiring diagram to fix the pulse issue we are having rebuilding it. my ecu model is 535 AD and I need a wiring diagram to instal it.
Hi, Does anyone know where i could track down some ignition switch wiring diagrams for a '98 wrangler (manual 4.0)? I haven't had any luck tracking them down online and for some reason my Haynes Jeep Wrangler 1987 - 2003 has all diagrams except for that one. Thanks.. Yep, BBB Industries is a company I've mentioned on the Wrangler forum over 20 times since October, 2016 for online free wiring diagrams.. Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and.