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Testing gives a 'big' spark
Posted: Wed Jun 09, 2010 12:34 pm
by Red_MAv
I have a fuse box mounted on the firewall of my QG where there is a positive wire in from the dual battery and it disperses through about 6 glass fuses to various accessories. When I connect my basic tester to the earth of the dual battery and touch the other end on the far end of a fuse it lights up the globe in the tr=ester as it should but it gives massive spark at the contact point. I dont recall this being normal. It used to just light up so i could see if the fue was still intact. Any ideas on what would cause this. The car doesnt get used much and i had just recharged it the night before.
Posted: Wed Jun 09, 2010 8:20 pm
by GeeC
What is the voltage and wattage of the light in your 'tester'?
Posted: Wed Jun 09, 2010 9:39 pm
by Red_MAv
Ive no idea, its just a metalic silver tester about the size of a pen i've had it for 20 years or so, but i have never had it spark like it does now, I thought maybe something wrong with the electrics but is it likely to be the tester maybe?
Posted: Sat Jun 12, 2010 1:22 pm
by Dooley
Seems a bit strange... is the circuit you were testing okay ? Has it been shorting or anything, was the fuse you were trying to test good or not ?
Does it happen with every fuse ?
Maybe try a multimeter, different test light, led with leads etc. and play around to try and find the issue. Try earthing off the chassis instead... ?
