ARCHIVE So what happens when you disconnect the battery while motor running?

[NLXTACY]

Disconnecting the battery cable(s) while a vehicle is running is a common trick to test if your generator/alternator was working properly on older, pre-computer cars/trucks. Now I am NOT NOT NOT recommending anyone do this to their trucks. I only did it because the question came up in one of my product threads but I felt it was good info to share and have it's own thread.

Again, I am doing this so you don't have to nor should you.

This topic seems to come up every once in a while in conversation and I used my past experience to dictate the answer. But I realized I only ASSUMED it for the 80 Series. Well in order to confirm what happens I went ahead and recorded it. This way everyone can see what happens and will then negate the need to do it themselves.

Now, a caveat, I've done a LOT of rewiring on my truck but I am fairly certain that this will net the same affect on even stock trucks.

You can see in the video but basically I needed to know for certain:
• Truck running, what if you disconnect the positive cable?
- what happens on restart?
• Truck running, what if you disconnect the ground cable?
- what happens on restart?
• Truck running, what if you disconnect both the positive and ground?

Care to guess BEFORE you watch the video?

 

[bugsnbikes]

Im guessing it fixes all overheating isues....

LOL- your clock was causing all those overheating issues!!!! everyone was so far off!

 

[NLXTACY]

I guessing it fixes all overheating isues....

Ultimately...absolutely. Just remove the battery

 

[thatcabledude]

Basically, it basically did what I figured it would do. Do I win anything? That's basically the only reason I posted.

 

[NLXTACY]

Basically I need to expand my vocabulary...basically.

 

[BILT4ME]

Basically I need to expand my vocabulary...basically.

Yeah, so you're a member of the Department of Redundancy Department. So what?

 

[Landseer]

Anyone care to explain whats going on here? It seems odd to me that it shuts off when both cables are removed but is fine with only 1 cable connected.

 

[Hornd]

It Appears to turn your valve cover red, because mine is silver and I have only run it with the battery in.

 

[LS1FJ40]

My clock resets to 12:00. And my clock has an alarm and yours doesn't!