Robert3916
Member
- Joined
- November 8, 2007
- Messages
- 10
- Reaction score
- 0
- City, State
- Ann Arbor, Michigan
- Year, Model & Trim Level
- 1993
I posted a thread about Fuel Pump problem about 3 weeks ago, found voltage
going back to pump Ok. Turn key on and 20 Amp fuse (#18) blows within seconds. Disconnected connector at tank and tested for shorts.(None)
Unplugged Inertia Switch and cranked over engine fuse does not blow. Bypassed power line from Inertia Switch with 12AWG Red Wire(w/20AMP in-line fuse about 5 foot from pump) and 12AWG Black Wire directly grounded to battery. In-Line fuse on jumper wires still blows when engine is cranked. Prior
to this I had tank out of vehicle and had ran same jumper wire setup to pump
with in-line 20AMP fuse(hooked up to the battery on my Astro(running) with
5 gallons of gas in vehicle. Ran pump for about half an hour at 45PSI with out
fuse blowing. (I had fuel recirculating in tank with shut-off vavle on gauge set-up to put load on pump.) My question is that is it posssible for a working
pump to draw a load at just cranking over the engine to cause the fuse to
blow with in seconds? Second question is it possible for another component
cause a load to go through my PCM to cause this failure in the fuel pump circuit?
Thanks Bob, (Robert3916)
going back to pump Ok. Turn key on and 20 Amp fuse (#18) blows within seconds. Disconnected connector at tank and tested for shorts.(None)
Unplugged Inertia Switch and cranked over engine fuse does not blow. Bypassed power line from Inertia Switch with 12AWG Red Wire(w/20AMP in-line fuse about 5 foot from pump) and 12AWG Black Wire directly grounded to battery. In-Line fuse on jumper wires still blows when engine is cranked. Prior
to this I had tank out of vehicle and had ran same jumper wire setup to pump
with in-line 20AMP fuse(hooked up to the battery on my Astro(running) with
5 gallons of gas in vehicle. Ran pump for about half an hour at 45PSI with out
fuse blowing. (I had fuel recirculating in tank with shut-off vavle on gauge set-up to put load on pump.) My question is that is it posssible for a working
pump to draw a load at just cranking over the engine to cause the fuse to
blow with in seconds? Second question is it possible for another component
cause a load to go through my PCM to cause this failure in the fuel pump circuit?
Thanks Bob, (Robert3916)