Using Headlight as a Short Finder
Posted to Technical Discussion Forum on 8/24/2010
63 Replies
Hi TDF,
Had some fun with this vehicle, I know this little trick has
been covered before.
First job Monday morning, "we saved an intermittent short
for you". (I was late, and nobody else wanted it :)
Complaint says "every 2 weeks the ECM10 fuse blows and truck
stalls. Gas station couldn't find problem. Tow In". So I
walk out to the truck with a testlight and 10 amp fuse,
found the ECM fuse (#15 position) missing completely,
install my fuse, check all other ECM/Ign fuses and go to
pull the truck in. As soon as I put the truck in gear, it
stalls. Yep, blown ECM fuse. So now I get my headlight and
put it in place of the fuse, truck starts and runs,
filaments glowing very dimly. As I put it in gear and begin
to move, I see this:
[Using Headlight as Short Finder]
What's next? Is there a better/quicker way to find this
short?
Robert from Florida
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