I have a very odd problem that has been plaguing my SW2 for more than a year. It has left me stranded several times and this morning it left me at home.Everything will be hunky dory and then I hop in and twist the key and everything goes black, lights, gauges, radio, everything just goes dark.When I put a charger on it that can feed 60 amp and a volt meter across the battery, when the switch is turned to "start", the amp meter pegs and the voltage drops to 2 volts. I can hold it there for 5 seconds or more without any smoke, flames or smells of burning anything.I pulled it down the block and got it started but noticed that when I increase the rpm, the dash lights would blink erratically. I have cleaned the battery terminals and ground connections. I have checked every connection I can find that might be even remotely related. I was going to pull the starter and make sure it engaged and turns, but after that rpm-dash-lights-freaking-out incident, causes me pause.So here I am in pause. Can someone press the play button?Thanks,TR.a
Edited by: sw2cam

Recheck the positive battery connection. Corrosion can get inside the cable causing exactly what your are describing. It is very common. More so if the car has an A/C Delco battery.

It's the battery. I touched the terminal lugs with an old UPS battery and it fired right up. I put the old one in and no workie.

Interesting.
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I love when a simple fix seems to be the solution to a pita problem. Good to hear it