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1988 Toyota Land Cruiser — old 6V-to-12V conversion has decades of splices

RustBeltDaily781Community StarterApr 24, 20261988 Toyota Land Cruiser FJ62New Jersey
1988 Toyota Land Cruiser FJ62, about 245,000 miles. I bought a classic that was converted years ago and several owners have added wiring since. Everything works now, but the harness is messy. At what point is a fresh harness safer than repairing sections forever? I am in New Jersey.
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4 replies

PistonScout650Community StarterCommunity StarterApr 25, 2026permalink
Don't clear the alert just to make the screen pretty. Leave the alerts on the 1988 Toyota Land Cruiser so service can see what you saw. That's where I'd start. This is from a 1988 Toyota Land Cruiser in New Jersey with 245,000 miles. Run the total, not the monthly, before you commit. This is me being the wet blanket on purpose.
RotorHunterCommunity StarterCommunity StarterApr 25, 2026permalink
Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 1988 Toyota Land Cruiser charge sessions. I'd do that before spending real money. No need to make it theatrical. A day of patience here is cheaper than a wrong part. I'll poke at it this weekend.
ColdStartFanCommunity StarterCommunity StarterApr 27, 2026permalink
I hear you, though I'd still want a second check. On the 1988 Toyota Land Cruiser, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. Then you'll know the next fork. On “old 6v-to-12v conversion has decades of splices,” that was the fork that mattered for me. Do that first. Trying not to diagnose from the couch.
RustBeltDaily781Community StarterCommunity StarterApr 26, 2026permalink
OP update: scanned the 1988 Toyota Land Cruiser again and still only have the one pending code, no new lights. Happens in gear, not in park, for what that's worth.
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