1. turn on ignition to red then push button for immobiliser 2. 20 amp main fuse wire keeps blowing in engine bay fuse box 3. car wont start 4. fans turn on
SOURCE: 20 amp fuse in the box under hood that keeps blowing
Does it only do this when the heat or A/c is on full blast.. ( I had a few of my customers with this problem and they needed a new blower motor..)
SOURCE: 30 amp ignition fuse in engine compartment blows at start
It sounds like a bad ignition switch or something is grounding out.Try to isolate the problem to key positions.See if the fuse blows when you turn the key to ACC(when your dash lights come on without starting)If the fuse does not blow then when you go to start it and it blows it could be one of many problems,the more common ones could be ignition switch,wiring,starter relay,starter soleniod,or perhaps the starter itself is shorting out,this can sometimes happen when a starter goes bad.
SOURCE: 93 corolla 1.8 No start Blown ignition fuse
I had a prolem like this one time a while back. what i did was got the wiring diagram and checked everything that was running through that 30 amp fuse. on the one i was working on it ended up being an injector wire pinched under the valve cover and it didnt short out till the car was driven til it warmed up and expanded after the valve cover gasket was changed. hope this helps!
SOURCE: large 20amp fuse keeps blowing
Change the fuse for the correct size AMP.
More details about Power Center Distribution, check the Section 8W Wiring Diagrams
Good luck.
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