June 24, 2018, 04:26:23 AM

Author Topic: 102a3 Voltage Regulator  (Read 1883 times)

Offline fairlang

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102a3 Voltage Regulator
« on: July 02, 2006, 01:37:19 PM »
My gen light came on about 800 miles ago. I would like to check the regulator on my 1987 102a3 MCI, but can not find the location.  What else should I check?

Offline Nick Badame Refrig/ACC

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Re: 102a3 Voltage Regulator
« Reply #1 on: July 02, 2006, 02:41:03 PM »
Hello fairlang,

Your voltage regulater is in your 3rd bay to the right side of the tunnel. Look behind the plastic housing.

Good Luck
Nick Badame
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Offline Stan

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Re: 102a3 Voltage Regulator
« Reply #2 on: July 03, 2006, 05:51:35 AM »
The alternator may still be charging even with the Not Gen light on, if it is the same as older models of MCI. The charging circuit comes of the stator and diodes to the battery, controlled by the regulator. The Not Gen light circuit comes off the R terminal through various relays to the light.

Use a meter at the battery to check if the charging system is working.  If it is OK, follow the wiring diagram to find the fault in the Not Gen circuit, frequently just a burnt or dirty relay contact.  Maybe someone with a 102A3 can offer more help.