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GQ alternator overcharging help!

For all things Electrical.

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GQ alternator overcharging help!

Post by danielbunt2 »

My alternator is not charging when I first start the car until i rev it over 3000rpm, then the charging voltage varies from 13.8 to 15.1. 15.1 being most of the time when driving under normal conditions. Is 15.1v too high?
Will this cook my batteries? How do i test the batteries? The car is a 89 swb gq patrol with an aftermarket oex enduro 70a alternator. Thanks in advance for any replys.
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Post by Clanky »

Sounds like the regulator is cactus. 15.1 wont cook the batteries in the short term (as long as they rent gels), but its no good having it only charge over 3000rpm
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Post by danielbunt2 »

they are lead acid batteries, and once it gets over 3000rpm it starts charging at any rpm. It's like it needs to be excited by revving it then its ok until you turn off the engine. Can you replace regulators? Thanks
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Post by -Scott- »

Does your charge light on your dash work? That's the traditional way to provide the excitation current to start charging.
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Post by Clanky »

regulators can be changed. Only thing will be if yours is internal or external to the alternator.
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Post by danielbunt2 »

Thanks for the replys, i've never seen a charge light on the dash? I don't weather you can test it or not?
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Post by danielbunt2 »

Thanks for the replys, i've never seen a charge light on the dash? I don't weather you can test it or not?
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Post by PJ.zook »

The charge (or battery) light should come on when the ignition is on. If it doesnt then something is wrong, wether its blown globe, wiring or reg/rec.
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