Electrical

DEREK LEADLEY

MEMBER
1997 MITSUBISHI TRITON
250,000 MILES

Battery and brake lights on the dash wont go out whilst driving. The batteryand alternator have been tested and are fine all terminals and leads have been cleaned including the earth. The veh is petrol alt belt is in place.

Friday, April 19th, 2013 AT 10:01 PM

3 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Brake light may be due to low brake fluid, what is the actual alternator charge rate voltage?

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Saturday, April 20th, 2013 AT 1:43 AM

JAGGERJACK06

MEMBER
14 POSTS

Also check the duty cycle of the alternator, it may be charging at the correct voltage but the ecu may not be switching it off. Alternatively, the Tritons have an 'L' terminal wired into the connector at the alternator. Basically the 'L' terminal is a signal wire to the ECU to tell it that it is charging the battery and switches off the light due to the ECU seeing a signal from the alternator. However, if the signal wire is damaged or broken, the ECU will get no signal from the alternator and think that it is not operating (althouiugh we know it is) and bring up the indicator lamp. Hope these suggestions help

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Tuesday, May 21st, 2013 AT 6:43 PM

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