Re: 23 series battery gauge problem

Posted by HH56 On 2014/10/6 13:24:53

Removing the wires from the GA terminal may ultimately be required but since you said the ign switch was off when it happens then the GA and COIL terminals should be inactive. If there is another wire on the AM terminal of ign switch not sharing a lug or looks added that wire needs to be chased to see if there is a CB associated with it. The normal factory circuit breakers are in the same string which actually feeds the ign switch.

Battery voltage goes to ammeter first and out of ammeter to a wire which has splices going in 4 different directions -- 1 to ign sw, 1 to regulator, 1 to headlight sw which has a CB attached and another to the accessory or body CB which on a 23rd series should be mounted on instrument cluster center bottom. If there is another CB on inst cluster that feed needs to be determined.

The normal accessory breaker feeds the courtesy lights and brake lights as well as some small optional items which may have been added. Larger options such as radio, heater, etc may use the battery side of the breaker as a convenient feed point but generally have their own inline fuses.

The first place I would disconnect is the output of that accessory breaker at the lower middle of instrument cluster and see if the problem is gone. If yes that would mean chasing courtesy & brake lights etc which could get interesting since many of the wires are hidden under upholstery or carpet. If no then check the breaker on back of headlight switch to see if that is the one cycling and if anything has been added to it. Normally it only feeds the head, parking, instrument and tail lights and is not active unless the headlight sw is on but could have had accessories added.