Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
1999 jeep XJ Cherokee 4.0 4x4 .This all started after new engine install . went for test drive ran fine bust would not restart Noticed I had left off fire wall to engine ground strap off I reconnected it With a big arking and sparking light show . Jeep then would restart but cranked slow 3+ volt drop when cranking(problem) and smoked/burned the ground strap from fire wall to engine .Mind you I have a 2ga cable from my battery to engine block and a short 6ga cable from that block point back to the body made a new fire wall to engine ground 6ga don't think grounding is an issue? .Other things NO blown fuses. remove batt ground and meter shows about 3volts + on chassis (meter on batt neg then to body ). Narrowed the voltage down to the IDO circuit fuse 16 in the PDC . I have separated every connector Isolating down to a section of harness that still has has about 30 ohms to ground How is a mystery .I am not convinced this is the issue yet I am convinced I will replace this harness and fix nothing . also noticed I have lost revers lights ,overdrive and a transmission range sensor code .The problem is laughing in my face I am not smart enough to see it. Dear lord straighten out my head please or any one with some wisdom caus I am out
I have a 2ga cable from my battery to engine block and a short 6ga cable from that block point back to the body made a new fire wall to engine ground 6ga don't think grounding is an issue . 2 6ga wires to frame @ different points
yep I have been their I am starting to under stand the definition of insanity .This jeep does run and start . I remove the batt ground cable out my test light or logic probe between batt - and block or baby I get 12v+ . all fuses are removed in the whole thing only #16 the IDO fuse is where i see the voltage go away. thank you for the input this fare I am trying to keep to the kiss method. Positive voltage at body Bad . Am I wrong? not trying to be a wises ass just going a little crazy again thanks for the input.
no blown fuses . This started with a hot no restart . Noticed I had neglected to connect the fire wall to engine ground strap during the reattachment it let lose sparks big like holy crap what is wrong sparks . Attached it any way . cranked it and saw it burn in halve. .Mind you at this point their is already 2ga cable from Batt ground to engine block . made them for the new engine wanted overkill on the grounding .This is voltage getting to chassis after the consumer . thank to all for the input even the 1/2 read it people been ohming out the harness Isolated continuity to ground in part of the harness under the steering wheel . diagram shows only a few things on it I have disconnected all of them I am just not convened this is the problem . I am failing the KISS method
I have lost revers lights ,overdrive and a transmission range sensor code
When you're faced with multiple issues, just pick an easy circuit and follow the trail. It's probably related to the rest of the stuff that's not working, or it may not. I would start off with your loss of reverse lights since I'd imagine that's pretty easy to get to. Are you missing power or a ground there?
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