Have 1999 4runner and i turn the key and nothing its not the neutral safety switch and not the starter is not ignition switch not the starter relay not the battery but if i jump the starter relay it will run View Comments

Did you check fuses 12 & 13? Do you get battey voltage on the pink/black and red/white wires at the ignition switch?

Check for battery voltage on the starter relay control coil yellow black wire at the starter relay in the power distribution center when turning key to start. Also check for ground on the starter relay control coil black white wire at the relay.

Check for battery voltage on the starter relay contacts from fuse 12 on red/white wire at starter relay.

Ignition switch, anything in the starter circuit including fuses, relays, connections, neutral safety switch, connections on starter, starter itself .

Battery good , cables and connections ? Voltage drop test starting circuit . Find a wiring diagram at http://www.bbbind.com/free_tsb.html Your vehicle has no relay ! Try wiggling the gear selector from park to neutral . Check B+ voltage at the park neutral safety switch . When you turn key to start B+ voltage goes to the neutral safety switch , if switch is good ,B+ voltage goes through the switch if in park or neutral to the solenoid on the starter . IF all is good starter energizes and spins the engine over . Starter Voltage Drop If you can't fix it with this info , your best bet have it towed to a qualified repair shop .

What year is your vue ? Battery an connections good ? Do the dash lights come on when you turn the key to run ? Headlamps work ?

It's piggybacked on to the starter.
1992 olds 88 royale starter solenoid Google Search

Also, check the neutral safety switch - Put your foot on the brake and put the car in neutral. Then try to start it. If it starts the neutral safety switch is bad. It could be the ignition switch. It could be to starter solenoid. Does it have an inertia switch? They rarely go bad but I have seen it.

I think the purple wire (or maybe the yellow) from the neutral safety switch goes to the coil side of the starter relay, turning it on so power is sent from there to the starter solenoid. You could check for this signal to the relay with a test light. The key must be held in start while you probe the other two terminals for the relay. If the signal is there, either a bad relay or the coil side of relay is not grounded properly. It is possible that the coil side ground is the neutral safety switch-grounding the relay's coil side only in park or neutral-in which case the nagging light on shifter (between off and run, it only works?) may be telling you the safety switch is the problem.

You may need to look at a wiring diagram, Greg. But the starter relay is the last component in the start circuit before the starter solenoid. From battery to ignition switch to "crank" fuse to neutral safety switch to starter relay to starter solenoid to starter-and back to battery through ground. That is the start circuit. Just that the wiring tying them all together makes it complicated.

Use a 12volt test light and connect to the starter energiser wire, get someone to turn the key and see if the test light comes on, if no then the starter relay has packed in. A further test you can do, but YOU NEED TO BE CAREFUL, set car in park DON't switch the ignition on, and direct feed the starter to see if it cranks the engine, if yes you are back to the starter relay.

Probably not a fuse. When turning the key to on, does it give indication of power in and power out of the ignition switch-do the warning lights and gauges on the dash turn on?
If the key switch is sending power, next thing to check is the starter motor. You could take it off and have it tested, it and the starter solenoid mounted on the starter, or you could do some quick electrical testing yourself, if you have a test light or multi-meter.

If you pull off the small purple wire to the starter solenoid on the starter, you should check if the wire has power when the key is held in crank position. If it does have power, the starter or solenoid is faulty. If no power on the purple wire in start, then power is lost between the key switch and the solenoid. This part of the start circuit includes the neutral safety switch on the transmission (or the clutch switch if manual transmission), and a starter relay somewhere under the hood. Check the neutral safety switch for continuity in park or neutral. The start wire out of the ignition switch goes to this safety switch, and power is passed on to the starter if gear is in park or neutral.
Not likely the starter relay is bad, but you may need to find and check it, if all else fails.

Yes there is a starter relay in the wiring diagram.
The yellow and lite blue wire goes from the starter solenoid to the relay. There is a yellow wire from the relay to a 30amp fuse. The key switch powers thru the neutral safety switch and then powers the relay on.

Items to check in starter system: Ignition switch, neutral safety switch, starter relay,wire to starter.

Where ever B+ end is your problem.