auxiliary battery for new gmc pickup
has anyone added a second battery to their new gmc pickup. my truck came with a second location for a battery but the manual details are not clear on what to do about wiring in the battery so that it...
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enblethen wrote:
Second battery location is normally for diesels.
To use as an auxilary battery, you would need to isolate it. I donot care for diode based isolators. A more robust is using a relay such as these and wired per instructions. The coil of the relay would be wired to a location that is "hot" when the ignition switch is in the "run" position. Remember to install some type of fusing to protect the system.
Battery disconnect
My old 79 F250 Camper Special had a second battery isolated for powering the Camper, you could drain it dry, and still had the other for starting.
Diesels use both for starting,twice had to be jumped at the air port, 1st time sent a Ford Ranger took about 10 minutes to put enough charge in the batteries to get it to crank. The next time it happened, I asked them to send two!!
