WONT START
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Joined: Jul 2010
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WONT START
i just bought a 91 bronco 302. my brothers battery was dead so he tried to take mine out while running and put his in to charge it up a bit, he got the neg hooked up to his battery and when he touched the pos cable to pos terminal truck shut off. now it will only turn over but wont crank. checked all fuses in cab but no luck. any ideas
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
First, welcome to FTE and the Big Bronco Forum. We will do our best to get you the most accurate info we can.
Are we to understand that an attempt was made to remove the battery from a truck while the engine was running? And now said truck won't start? The disconnect was not only dangerous but the sudden loss of battery voltage most likely fried the voltage regulator in the alternator. There is no telling what the arcing and inrush current adversely affected. If the battery that was installed (with the engine running) was damaged or had a dead cell the short created by connecting it to an alternator pumping hundreds of amperes at 12 VDC could well have taken out the alternator and any other component that was connected to it... which basically includes the truck's entire electrical system.
Are we to understand that an attempt was made to remove the battery from a truck while the engine was running? And now said truck won't start? The disconnect was not only dangerous but the sudden loss of battery voltage most likely fried the voltage regulator in the alternator. There is no telling what the arcing and inrush current adversely affected. If the battery that was installed (with the engine running) was damaged or had a dead cell the short created by connecting it to an alternator pumping hundreds of amperes at 12 VDC could well have taken out the alternator and any other component that was connected to it... which basically includes the truck's entire electrical system.
