![]() Click the search button then the blue link. Under system click engine, under subsystem click starting. You can find a free wiring diagram here Enter vehicle info. this powers the control side of the starter relay. There is one more fuse that get's B+ power from the ignition switch and ign A fuse ,crank fuse fuse #8 10amp. if the ignition fuse doesn't blow the problem is in one of these other fuse circuits. , Plus trans fuse #20 10 amp ! Pull out these fuse an try to start the van. In the I/P fuse panel the gauges fuse #4 10amp, air bag fuse #10 10amp, turn b/u fuse #16 20amp. 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. 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. The fuse that blows ,is it IGN - A 40 amp. Do you know how to find a short circuit ? Video's on youtube show how. ( 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. You need to isolate the circuits, pull fuse's till the fuse doesn't blow ! Any one of those circuits could have your short. A/C compressor relay, rear window defroster relay ,daytime running lights. ![]() you will also see it powers the igintion switch ,look at last part of ignition switch, when in start or run that 40 amp fuse powers all those other fuse's plus three relays i see there also. You will see Ign A 40 amp fuse at the top of the page. First blue link scroll down to the second diagram. year, make, model an engine, Under system click on electrical distribution, under sub system click on power distribution. That 40amp fuse powers a lot of subsystems ! If you were to jump 30 to 87 in the relay box the starter should spin the engine over, not start an run just spin ! 85 & 86 is the control side. If you pull the relay out of the box it's plugged into an look on the bottom of it you would see four sets of numbers ! 30 & 87 an 85 & 86. Which fuse ? IGN A - 40 amp ,under hood fuse / relay box ? This fuse powers the Starter Relay and Ignition and Start SwitchÄoes your vehicle have a manual or automatic transmission ? The starter relay could be shorted inside, It's also located in the under hood fuse box. What all does that fused supply B+ voltage too ? Do you know ? That would be your first thing to find out ! Do you know what a electrical distribution diagram is ? Do you know how to test electrical circuits with a DVOM - digital volt ohm meter ? Do you know what a short to ground is ? This load test will give you the exact amp draw of the starter and solenoid and then they can tell you if it exceeds the manufactures spec. Remove the starter and take it in to a reputable Auto parts store and ask them to perform a load test. Once the bolts are removed the starter will already be wanting to come out. Once the wires are removed you will have two 9/16(generally) bolts that can be removed with a socket and ratchet. The Starter will need to be removed, taking the positive cable loose from the battery, then remove the battery cable from the starter with a 1/2 or 9/16 generally socket and a 5/16 generally for the solenoid wire. If this was the test performed this is not an accurate test for a starter. I am not sure how they tested your starter, however I have seen several auto parts stores use a diagnostic load machine that checks the starting system without the removal of the starter. Again use a wire brush to clean both surfaces and check the cable ends (eyelets) for a good connection. Then move to the starter, Using a 5/16 remove the solenoid wires and a 1/2 or 9/16 to remove the battery cable from the starter. Using a socket to remove the ground cable, once removed use a stiff wire brush to clean the surface of the block, then reconnect to the block. ![]() Also check and clean the connecting points. (The starter and the block) Make sure they do not have any broken insulation or dark discolorations in the insulation which represents excessive heat and a weak spot in the cable. But before reconnecting them, inspect the cables from the battery to their respective connection points. Using a terminal brush clean both the negative and positive terminals. If it's a top post then it's likely to be 7/16 or 10mm. I would suggest removing the battery cables, If it's side post a 5/16 wrench or socket. One is that you have a bad connection either on the battery or on the starter or even a bad battery cable. There may be several issues causing you problem. SOURCE: What could cause a 40 amp ignition fuse to keep
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