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Author Topic: my new 'girl' (a TJ200)  (Read 4022 times)

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Offline bushmechanic

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Re: my new 'girl' (a TJ200)
« Reply #40 on: July 17, 2017, 07:30:36 pm »
You seem to be on top of this! I always thought it was cut down to 6 volts while running. I know some systems use 12 volts for starting then through the resistor for running. Trouble is if you put it direct voltage then it will go to what the alternator puts out, say 14 volts.

Offline krusty

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Re: my new 'girl' (a TJ200)
« Reply #41 on: July 18, 2017, 12:05:47 am »
Bushmechanic....

I thought I read somewhere else that the ideal voltage for a UC12 coil was around 8v. As for the 12v start, you will see starter solenoids with an in and out for high current and then 1 or 2 terminals in the 1/8" range. If it has one, it is to activate the solenoid. If it has 2, 1 is to activate the solenoid, the other is to connect to the + terminal on the ignition coil thus bypassing the resistor and is only activated when the starter is cranking.

There is an alternator on my old TJ but wiring that up is on my todo list :) Since it left my house back in the winter is has been in the woods with only fluid top ups and an ignition coil.  I will bring it back home in the fall for a once over before the cold comes.