Having problems with your 1993 Jeep Cherokee Country ?

Charokee charging problem

\015 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?\015 Posted / edited by AnonymousUser on : 22-07-2019

Answers :

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.\015\012If 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.\015\012I can't give you a range because ot the variation of load on the output.\015\012
\015\012If you measure the resistance of the field winding, you can get a rough idea of the current it draws.\015\012For example; measuring 100ω would yield a max current of ~120mA. ( I=E/R)\015\012
\015\012I have something in mind about 200ω but that seems too high but it should be in the range of ~100 - 200ω. \015\012
Repair Help & Product Troubleshooting for 1993 Jeep Cherokee Country

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