Check out this site, it may help you.
http://www.etrailer.com/faq-wiring.aspx
The center pin of a seven blade trailer plug is for reverse lights, not power. What type of truck is it? What trailer plug do you have...
Start with a good tune up. Could be a bum spark plug or spark plug wire.
Replace one wire at a time so not to mix up the firing order.
You don't. A 2 prong plug has two wires, one called live (black or red wire in the US) and the other is neutral (white or gray wire in the US). A 3 prong plug needs a third wire for ground (bare copper, green, or green-yellow in the US). The only time you can replace a 2 prong plug with a 3 prong plug is if the 2 prong plug incorrectly replaced an original 3 prong plug.
Location of diagnostic plug in 1990 Mazda 2200 pick up truck?
you could wire it up to a cigarette adapter and then plug it into a transformer like this one http://www.thinkgeek.com/gadgets/travelpower/afee/
the trailer plug was getting pinched by the spare tire under the bed of the truck. re tape the wire and relocate it so it does not get pinched.
your truck should have came w/a plug in the glove box. take the plastic triangle cover off in driver side floor board (beside your left foot sitting in your truck). you will find a place that the plug plugs into there. the wires are labeled on the plug/pigtail just match them up w/brake controller
There is a pin at the end of the mag tube. Look for the flared end and tap the pin out by tapping on the opposite side (i.e. the unflared end). Use a small bar or pin of some sort to lever the aluminum plug out. Nothing retains the spring so heads up. When you put the spring and plug and pin back make sure you get the orientation right. The plug has to have the hole/threads toward the end of the tube, and the cut-out in the pin must line up with the handguard retaining screw hole in the plug.
can you show me the wiring diagram or schematics for a Chevy truck
A correctly-loaded plug should not heat up at all. If one (rather than both) pin is hot, then it probably indicates a poor connection into the socket (receptacle).
The distributor has two screws from the closer to the fire wall of the truck count one pin of your cap to your left hand faicing the engine NEW ANSWER: It would really help to know the year. Take the distributor cap loose so you can raise it up and see the rotor. Then take the #1 spark plug out. That would be the first plug up front on the drivers side head. Then put your finger over the plug hole while you have someone to bump the key/engine over alittle at a time until you fill air stop trying to push your finger off of the plug hole, as soon as it stopes then pay attention to where the rotor is pointing on the cap. That will be were #1 wire goes on the cap. It is tricky to do.so do it a few times until you get the fill of it. Remove the coil wire before doing this.