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Ok thank you so much and how do i tell if the relay is bad

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If you turn key on it should make a quiet click sound routing the power to the fuel pump

Posted on Jan 04, 2011


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Why doesn't my low beam headlights work when all the other lights do ?

The most common cause of low beam failure on trailblazer, buick, and GMC, are the micro relay under hood in fuse box. One relay is for the low beams and the other one (beside it) is for the cooling fan. It is part number 15016745 and has four prongs on it. Just swap the cooling fan relay, with the low beam relay. This will tell you if it is bad. Then see if low beams work, If they do its a bad relay. Good-Day! Make sure to swap the relays back so that the cooling fan is working ok!

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You sure the ground wires all reconnected? Check for power at the inertia switch. If it has power,the pump may be bad. Power to the Inertia switch comes through the FP relay, from the fuse. The relay is in a box called the CCRM (constant control relay module) Power from the relay to the switch is Dark Green/ Yellow wire.lF that wire has no power in the crank mode, then I think the CCRM is bad. The CCRM is located behind the coolant reservoir on a bracket. The ground for the CCRM is right front of engine compartment G103, dont really have a picture to tell you where exactly to look. Thanks for the detailed story, a lot of people write " it wont run, whats wrong"

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I've swapped the fuel pump relay with another similar relay. It sounds like the pump is bad, but I would check the actual fuel pressure.

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ok, well as for the relay, yes there is one in your under hood fuse box....or inside the drivers door...but if you don't hear the pump, fear the worst, it may be dead.....happens ALOT.....check and change the relay, about $10, then if nothing, time for a new pump.

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check the wiper run relay number 1 in the power distro box. Ford Explorers are bad about these relays either not making contact or being bad, swap with know good relay from another system on your truck to verify

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Usually faults such as this centre around the stalk switch. It sounds as if one of the connections between the stalk and the relay are broken.
This may be a supply to the stalk switch, or more likely the return to the relay.
Check the switched supply to the relay first in the on position with a volt meter. It is usually a bad contact.

Best of luck, and thank you for using Fixya.

Please return to rate or for more help.

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ok first the fan relay should be located inside the elecrical box. this is usually located on the drivers side under the hood. next even you have only one speed when you turn the switch it's because the reostat is bad it is located in the fan motor housing. hope this helps.

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