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Re: dodge dakota selector switch and relay switch
A selector switch is what you use to turn on or off a circuit such as the lights or wipers. A relay switch is used by a circuit that has a large current draw and a relay uses a small source of current to control a large usage of current. Most fog lights use a relay to control the fog lights. You turn the fog light switch on (that is a selector switch) and the current from that circuit then activates a relay switch to let the larger current draw that the fog lights use go to the fog lights and you have light. A relay also controls if the fog lights are on when the bright lights are on. (on most cars if you turn the bright headlights on the fog lights will go out until you go back to the regular lights)
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The Dakota doesn't use a switch it has what is called an emergency shut down relay, it is relay #3 in the under hood power distribution box. Also the fuel pump relay is located in the same box, it is relay #5. What symptom do you have?
In the Dodge Dakota the blower motor resistor is located under the hood, on the right side firewall.
Dodge Dakota Blower Motor Resistor Location:
Dodge Dakota with a complaint of no blower operation. After unplugging the harness connector and removing the two screws, you could remove and examine the resistor coils for damage. The heat and subsequent rust damage are clearly visible in the picture below.
Most likely to be one of two things: a bad ignition switch or a blown starter fuse. I think at the front left side of the engine there is a relay box on top of the engine, inside this is a 40amp fuse for the starter. Replace this. (It may be in a different location on a '94 - check your owner's manual) Wiring harness faults at the steering column is a common problem with Dakotas and these can develop a short circuit that will blow out the starter fuse. You may want to carry around a spare fuse with you.
If you mean the engine does not crank over (cranking over and starting are two different things) then it could either be the ignition switch or the fusible link, or the starter relay or the starter. You need a test light or volt meter to check where the power ends through this circuit. If you do not have either of these or know how to check voltage, I would go to the parts store and buy a starter relay. This is the easiest and cheapest to try. After you buy the starter relay you will find the old one mounted on the inner fender panel or fire wall on the driver side (under the hood). Good luck