Question about 1993 Jeep Cherokee Country
Wouldn't it get full voltage until it started charging then ramp down to a lower voltage to maintain the charge rate? Does the computor control the ground as well as the field voltage?
I'm not sure whether the high or low side of the field is controlled; typically, it is the low side with 12V applied to the field and the low side controlled by a a transistor in the ECU.
If you are measuring 12V at a field terminal, it may be normal and when I have monitored this voltage on the controlled side, it was always lower than 12.
I can't give you a range because ot the variation of load on the output.
If you measure the resistance of the field winding, you can get a rough idea of the current it draws. For example; measuring 100ω would yield a max current of ~120mA. ( I=E/R)
I have something in mind about 200ω but that seems too high but it should be in the range of ~100 - 200ω.
Posted on Sep 08, 2008
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Posted on Jan 02, 2017
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