20 Most Recent 1992 Nissan Pickup - Page 4 Questions & Answers

The starter relay is energized by the ignition switch, through either the neutral safety switch, or the clutch safety switch.

check spark plugs. gap at 45, also cap and rotor for corrosion and wear, bad wires will also participate.

There are two 10mm nuts on the backside of the light in the bed. If you have a bedliner you will need to pull it out of the way so you can get to the nuts. Or drill a hole in the liner after you locate the nuts.

I'm assuming you have a no-crank condition. check interlock relay and safety interlock. Safety interlock is on shifter if you have automatic. It's on the clutch pedal arm if you have manual. Interlock relay should be in engine compartment relay box. You can bypass both of these and the ignition switch by jumping the solenoid. See troubleshooting procedures here: http://www.fixya.com/cars/r5821173-doesnt_car_start_gasoline_engines
and let me know if you have questions.

A leaking head gasket would cause oil to leak into the coolant or coolant into the oil pan, also coolant into the cylinders and compression into the cooling system.Lack of coolant would not keep the engine from starting but coolant in the cylinders could foul the spark plugs.If you take the radiator cap off and can see bubbles in the coolant when the engine is running, or the radiator builds up an excessive amount of pressure, it could be the head gasket.You could remove the thermostat to make sure it is not stuck closed.The only way to know for sure if the head gasket is leaking is to take the cyl head off and inspect it.

Usually a sign of a bad connection to the power source.Check the sockets and connections back to the headlight switch.Also check the ground circuits.

Ford : back the truck up 10ft put truck in neutral and disengage four wheel low. (You can't drive in four wheel low cause its a pulling gear and you won't do over 3-5 mph.)
Nissan: start truck see if it idles normal. If so rev motor and check throttle for sticking and check EGR valve make sure its not stuck open or malfunctioning when you drive it..

Sounds like a slipping transmission or a slipping clutch. Without more info that is about all I Can say about it at this point.

The clutch switch (AKA starter cutout switch) is located at the top of the arm that the clutch pedal is attached to. Use a paper clip and jumper the connector to the switch and see if the engine starts, if it does the switch is either out of adjustment (where applicable) or defective.

a 1993 will work or a 1991 chevy dipstick can be found at junk yard