Question about 1993 Dodge Dakota

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Inertia swich can anybody tell me where this is located the fuel pump is new, the fuses are goood and the relay is as well i have 12v to one prong of the plug and 7v on another. i was able to get to other prongs to ohm out as grounds. so out of 5 prongs of my plug i have found out what 4 of them are butn i am unable to determine what the 5th prong is ad cannot seem to find any schematics to tell me

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  • shaun renard Jan 11, 2009

    thank you for the info this should be very helpful. can anybody tell me where i can find a diagram for the fuel pump plug.

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Dodge dosent have a inertia switch the relay should have battery voltage on one wire with key on, ground on one wire,and when cranking the car another wire should get power but only while cranking and teh last wire will be power going out to you're fuel pump

Posted on Jan 10, 2009

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This should be in the owner's manual. I found the below on autozone.com, their repair help location:
An inertia switch is used as a safety device in the fuel system. The inertia switch is located in the cab, generally under the dashboard on the right side. It is designed to open the fuel pump power circuit in the event of a collision. The switch is reset by pushing each of 2 buttons on the switch simultaneously (some models use switches with only one reset button). The inertia switch should not be reset until the fuel system has been inspected for damage or leaks.
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The FPDM can have corrosion build up under it, causing the PC Board to crack.
This is a picture from my 2006, where the case was cracked, but had not cracked the PCB.
The spare tire cable for the lift is to the right of the picture, the tire on the left is the driver's sode rear tire, taken facing the front of the truck from the rear bumper
sscullys_80.jpg
sscullys_81.jpg

The new kit has stand offs on it, to provide some room so the corrosion does not happen ( or happen as much )
sscullys_82.jpg

This is what the fuse for the fuel pump relay, and the fuel inertia feed power to, to run the fuel pump.
sscullys_83.jpg

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2 Answers

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