Question about Toyota RAV4

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As soon as i turn key in ignition it blows a 20amp fuse under hood,know little about electrics but afford to take it to garrage,checked starter connection nothing. any help would be greatful.

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Which fuse does it blow? do a wiggle test to wires that comedown from ignition switch.the component fuse would give us a clue. does vehicle start with fuse blown?

Posted on Mar 27, 2011

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Posted on Jan 02, 2017

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2001 Chevy blazer came out one day and it was dinging as if my key was in it got it to start with a jump shut it off took battery out and charged it put it back in when I turn the key I get NOTHING!


Check power an grounds for ignition switch , voltage drop test the starter circuit . Go to youtube an check out videos on basic electrical trouble shooting , voltage drop testing ,how to read a wiring diagram .Then go here http://www.bbbind.com/free_tsb.html free wiring diagram ! Look at power distribution under electrical distribution . Check main fuse's Maxi fuse's that power the ignition switch ,IGN.C fuse 20amp in underhood fuse box ,then check crank fuse 10amp in same fuse box .Check the starter relay in the under hood fuse box . Check the circuit form ignition switch to the starter relay , pull the relay out an look on the bottom you should see 4 set's of numbers 30 - 87 - 85 - 86 . Pin 30 or 87 should have battery voltage ,one or the other ,not both . if you jump those two at the base (where it plugs in ) not the relay pins . It should crank the engine ( if starter is good an there are no opens in the circuit ) Pin's 85 an 86 are the control side of the relay ! You may want to check out videos on how a relay works also > Good luck hope this helps

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When does the fuse blow? As soon as it's replaced or when you try to start the car? Take the small wire off the starter solenoid. This will separate the fuel pump from the starter solenoid. With a new fuse in turn the ignition switch to the start position. Does the fuse blow? If so, then the fuel pump and/or the wiring to it has a short. If the fuse doesn't blow then the starter solenoid or the wiring between the ignition switch and the solenoid has a short.

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Could be a short circuit on ignition wires or a broken ignition switch. Or a short circuit on starter wires or inside the starter motor itself.

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( one question i have is every time the ignition fuse blows do i need to replace the starter relay? ) NO ! You have a dead short to ground on one of the circuits that fuse feeds. Do you know how to find a short circuit ? Video's on youtube show how. The fuse that blows ,is it IGN - A 40 amp. located in the under hood fuse/ relay center ? That fuse feeds B+ voltage to the ignition switch ,which powers up other thing's ,fuse's etc.. Not just the starter relay ! I see five other fuse's that get power from that fuse when ignition switch is in the start or run position . In the I/P fuse panel the gauges fuse #4 10amp , air bag fuse #10 10amp , turn b/u fuse #16 20amp. , Plus trans fuse #20 10 amp ! Pull out these fuse an try to start the van. if the ignition fuse doesn't blow the problem is in one of these other fuse circuits. There is one more fuse that get's B+ power from the ignition switch and ign A fuse ,crank fuse fuse #8 10amp. this powers the control side of the starter relay .
You can find a free wiring diagram here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine . Under system click engine , under subsystem click starting. Click the search button then the blue link.
If you pull those fuse's i mention and it still blows the fuse look for a shorted ignition switch or wiring from ignition to the starter relay , not the relay itself. Park neutral safety switch . Isolate the circuit , pull the relay out of it's socket ,pull the crank fuse #8 in the I/P fuse box. with a ohm meter check to see if that part of the circuit is shorted to ground. Do you know how to do that ? Do you have a volt ohm meter ? You can buy one cheap at parts store .

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1 Answer

02 Escalade will not start


It will most likely be a poor earth issue, make sure the earth lead between the battery and the body is good and clean and check the one between the body and motor.
Poor earth connections cause excessive current draw and will blow fuses.

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1 Answer

2002 intrepid 2.7 Im getting no crank from the starter and I dont hear the fuel pump kicking on when the ignition key is turned on, I do get power to the radio and dash, Ive checked fuses and replaced...


Under the hood, there should be a fuse block. Remove the cover and there will be a 20amp(i think) fuse that protects the fuel pump and starter circuit. I've run into this problem many times and every time it ends up being the starter that blows the fuse.

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1 Answer

I have a 1993 camaro 3.4 liter. As soon as I turn the key to the on position not all the way to crank over car the ignition fuse #11 blows. I have unplugged the wire harness to the transmission and it...


Is this fuse 11--10 amp under hood fuse block?
If so, I'd unplug your ignition module. With dis ignition, the coil pack sits on ignition module. The end of ignition module that has two electrical connectors, one is a two wire connector, wire colors pink and black, disconnect it, see if fuse still blows? If it still blows and we're talking about the same fuse, at least you know what isn't causing it to blow. I'm trying to make sure we're on the same page about the fuse, according to my wiring diagram?

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2002 chevy van 2500 when i turn key to start van


Fuses only blow if-Old,Overheated or you have a Short circuit.
That should be any easy fix,to the extent that there aren't many 40 Amp Fuses and you will need a wiring diagram to follow the problem from the fuse to the cause. If you know what fuse it is, you can guess,but I wouldn't recommend that,it will be time consuming and maybe costly ,if you don't have a test procedure to follow and throw parts at it.
Don't replace the fuse.Their expensive and will keep blowing.

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2 Answers

ELECTRICAL PROBLEM, KEY STUCK, FUSES BUZZING


The fuses that are buzzing, are these the ones you replaced? Sounds like a bad connection to the fuse panel, but the ones you removed are they fuses or relays. Did you have to repair any wiring or plugs for the window? Check the connection at the main window panel, if it has a bad connection such as not plugged in completely.

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1 Answer

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It could be either the ignition switch,clutch safety switch(if applicacle)or the starter solenoid,I'm including the circuit diagram for you,one of the 2 or three if it's manual trans has short,if the fuse is blowing as soon as you turn the key on(not engaging the starter)it will be in the switch itself or the clutch safety switch.If it happens when you go to engage the starter it's most likely the solenoid.
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