Join Date: Jan 2004
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Re: reverse lights question
The ground is connected at each bulb, check that but unlikely that both grounds are bad.
Power comes to the tail light harness through a couple of connectors. Would assume that since the wiring diagrams split up 1980 to 1983 and 1984 to 1986 (I have a 1983 and 1985 that are the same) you have a harness hanging down the passenger side, up against the firewall, it splits out to the transmission (backup) and the transfer case (4wd).
It's always a dirty connection (or just unplugged). Lol mine don't work on the CJ-7 right now.