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Old 06-13-2013, 07:45 PM
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Glow plug relay problem ?

My truck could not start and the shop found one battery bad and the other one weak. These are DuraGold batteries purchased at Autozone six months ago. They carry 3 years free replacement plus 5 years pro-rate.

Alternator checked out at 85 amps output and was OK.

I took them back to Autozone and once the replacement are installed the truck started without a hiccup.

Some people are telling me that the problem is not with the battery. They claimed it was an issue with glow plug relay malfunctioning and thus battery was overdrawn. I charged the batteries up and it took less than 30 minutes of full charge before the charger meter showed batteries were full and switched into trickle charge mode. However, after five cranks batteries went dead again. I recharged the second time and again it took less than 30 minutes before charger showed they were both full. I'd think that is solid evidence of battery having bad cells.

I am convinced the issue was failed battery. The Autozone fan club claimed nothing wrong with batteries.

So, what is the method to check and verify if the GPR malfunctions?

Thanks
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Old 06-13-2013, 08:20 PM
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Take a voltmeter and test across the poles on the GPR. If its drawing it would show up I would think.

These trucks are hard on batteries so I would just move on and see what happens. I ha cheapies that didn't even last a year. Interstate's for me now
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Old 06-13-2013, 08:21 PM
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Take a voltmeter and test across the poles on the GPR. If its drawing it would show up I would think.

These trucks are hard on batteries so I would just move on and see what happens. I ha cheapies that didn't even last a year. Interstate's for me now
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Old 06-13-2013, 10:04 PM
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the stock GPR's on these trucks suck. get a stancor glow plug relay. it will last for a long time.
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Old 06-14-2013, 03:34 AM
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Troubleshooting GPR & GP's

Last year my stock GPR was making a whopping 3.2 volts. Replaced it with a Stancor... no issues at all.
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Old 06-14-2013, 12:20 PM
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Also check your connections. If there is any corrosion then that will not help matters. I replaced my terminals & it helped tremendously. If you can check amp draw it might be worth a show to see what they are pulling. I checked mine & they pulled 180amps with the glow plugs engaged. I am stil trying to get damn Walmart to replace my other battery that's going bad before the warranty expires in it.

Here is the Stancor relay 586 105111 White-Rodgers | Mouser
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