Re: 36-120 Voltage Question

Posted by HH56 On 2020/3/20 15:40:02

Here is a bit from Motor's Manual, 15th edition on the generators and some troubleshooting suggestions. Believe your car would fall under the GAR description but if it has more poles maybe CO. Looking at your photos and the fact I think your symptom would fall under fully charged battery but high charging rate, one of the excess voltage troubleshooting tips is a shorted wire. You might investigate the connections on the voltage regulator to make sure one of the strands has not grounded out to the case or another terminal and is allowing the resistors in the regulator to be bypassed.

The charging circuit diagram is from a 35 120 book. I do not have a 36 manual to know if the 35 circuit is similar to 36 but at a quick comparison to a 37 charging circuit it may be if your regulator internally looks anything like the illustration and also contains the circuit breaker assy. The main difference might be 36 is mounted directly onto the generator and the 37 regulator is on the firewall.

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