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Hi my 2003 terracan lights wont work(Head lights) parkers do and indicators work,spot lights work, Battery light remains on with parking brake light all the time, Stero cuts in and out as does the 4wd when the brake is applied for only a second.
Speedo stopped working but it started again.
[b]I have disconnected battery cable while car is running and it does not stop so the battery is charging.
While the battery was disconnected and motor still running the parking lights would flicker on and off when removing and putting the cable back to terminal.
First, why did you kept the engine running while disconnecting the battery. This is asking for major damage in almost every single electronic component in your terracan.
If power (electricity) is managed ONLY from alternator/regulator without the battery, it means all sorts of voltage changes, transients, spikes and surges will go through every single electric and electronic component in the vehicle. If the engine still starts and something electric still works normal, I say you were lucky.
As for the strange behavior, I suspect some major wire harness got pinched, unplugged or damaged. This is especially notorius when you get "intermittent" problems (stereo cuts in and out).
I know this is a real pain in your behind, and I strongly suggest taking the car to a knowledgable auto/electric shop, so they can diagnose what is going on. This will probably not be fast and neither cheap, as this sort of damages is like doing a witch hunt while blindfolded.
Let us know
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