What happens when a main fuse is pulled?

Special hazards are faced when switching on or off a main circuit breaker. This article discusses safety hazards at residential electrical panels when the main fuse is pulled or main breaker is switched. While we recommend that a professional inspector check these devices in some circumstances s/he should not do so, and extra care is always needed.

When to disconnect battery for Fuse pull test?

I did find a TSB that says that the computer might cause a draw only after it has been turned on and then off, so disconnecting the battery to set up the test gets rid of the draw if it’s that.

What does TSB say about fuse pull test?

The TSB states that after you hook up your Ammeter and jumper wire between the battery post and terminal, switch the ignition on (DO NOT START) and then off again. Obviously you are not having this problem, but I thought it would be of interest and useful for you to know about.

Can a seat motor cause a fuse pull?

In my vehicle these are covered by dedicated circuit breaker fittings not by the usual standard block of fuses and relays. I am aware of possible current draws occurring with faults from either of these items (ie. a faulty seat motor and a power window motor that continues to run due to a faulty switch).

I did find a TSB that says that the computer might cause a draw only after it has been turned on and then off, so disconnecting the battery to set up the test gets rid of the draw if it’s that.

Can a 1985 GM Truck Pull a fuse?

I don’t know how your 1985 truck is set up but in my late model GM car I could pull all the fuses and relays and it would not isolate 2 known areas of current draw, namely the seat motor for seat adjustment and the power windows.

What happens when a main fuse is pulled?