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i have a 98.5 cummins 24 valve that the grid heater will only work when i unhook the battery cables and put them back on then it will work for about 20 starts then do it all over. I also notice the lift pump dosent run for 3 sec or 25 when you bump the key. Im leaning torwards a bad ground or bad ECU.
It might be good to check electical connections. The battery cables, The gray connectors near pass side negative cable, PCM ground strap, ground behind starter, grounds at both fenders, and make sure both batteries are good.
2008 3500 stock QCLB dually Inferno red. Toys: Fuel injected Rampage, Road Grader, 1586 tractor, 60K genset, Honda ATV, and more. Back in business with a Hitachi EX270LC excavator. The dirt slinging has begun with 50+ acres to clear.
i pulled codes with the scan tool and i got p0382-glow plug circuit B i also pulled ABS codes not sure if there related but they were Code 43,45 Open ECU Output and Code 65 Open Power Relay Contacts. I cleared all codes and my grid heater and lift pump stopped running.
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