Want to put in a push button starter in 94 jetta ; has to post on back one ignition switch other is soleniod. what do i wire to the ignition post ? thanks

Sure can. cut the yellow wire off the ignition switch under the dash. Run a fused wire (40 Amp is good) from the battery to the push button. Put the yellow wire to the push button. Beware though, you are bypassing the neutral safety switch. It will crank anytime you push the button.

Check out step six here: http://faculty.ccp.edu/faculty/dreed/Campingart/jettatech/nocrankdiag/index.htm
Instead of the short wire between terminals, you will unplug the top plug and run a wire from both terminals to a momentary or non-latching switch (button) that you mount to one of your blank button close out panels below the radio. You still have to put the key in and turn to on position, then use the push button switch to start. I have been using this since my key ignition switch went out.

most starts only have to bolts..MAKE SURE TO TAKE THE BATTERY TERMINAL OFF FIRST..unbolt the starter and the wires to it..i have a shop close to my house that fixes starters and alternaters..usually about 5 or 10 bucks cause the brushes go bad..make sure u check the starter relay under the hood first as well as the soleniod either on the starter or somewhere in between..relays r about $10 and soleniods r about $20 or $30..if u hold ur ear to the relay while someone turns the key it will click..or u can pull it and put 12 volts through the coil side in it and test the switch side for continuity..the starter shop can tell u if the soleniod is bad..hope this helps u..i know how it is when times r tight..

check timming belt and it it is not turning this is your problem and if so this is zero clearence motor so there is also probley more dammage done to the motor

Yes, it does sound like the starter soleniod. Have someone turn the switch while you tap the starter and solenoid with a hammer.Ssometimes it will make it operate but it still needs replacement. If the starter has not been replaced I would replace it too.

check your fuses under the hood and under the dash
check polarity of battery (if you unhooked booth leads)
is the battery any good?
you probly conected the leads to the starter incorectly (recheck them)

(the following asume your tur n key ignition system is functioning properly)
to test your tur n key system simply hook up a test light to the small lead running to the starter cylynoid "while the wire is disconected" and have a friend turn the ignition over. [dont furget to test the test light first lol]

or even got the wrong starter completly (usaly a store problem)
did you " bench test" the new/used starter befor installing it ?
iv goten brand new starters doa

is the ground strap hooked up ? is there corosian on the battery posts or any of the high amperage conections?

is the cylynoid on the starter or somewhere else under the hood?
cautiously try to bypass the cylynoid ie run a hot wire to the small lead on the cylynoid
(this can usaly be done by jumping from the main red wire on the starter to the hot lead of the cylynoid)

notes: when bypassing the ingnition system (jumping the cylynoid)
DO NOT have the ignition in the on postion and it is best to remove the lead from the cylynoid (incase of a short in the wire's some place)

if nothing remove the large red wire on the cylynoid and touch it directly to the starter lead itself (there will be a fair amount of spark when doing this its normal) but make shur you are conecting to the starter lead and not a gound point as this will cause exsesive sparking that isn't good
dose the starter tur n the engine over
back track untill you find the fault be it starter itself,cyclynoid,wiring,blown fuse,corosion,bad battery,

still cant find the problem take it to a shop!
hope i helped yah

there is a wire comeing off the starter. follow it up till it ends. this should be your starter soleniod. there is two large wires on the sides and two small terminals in the front. only one terminal on the small should have a wire. the other large should go to your battery. makeing sure your in park with the ignition on short the small wired terminal to the big battery terminal. this can be done with two alligater clips and a push button switch, or just a wire touched to both poles.

If you're looking for wiring a push-button starter, then you just need to connect one terminal of a momentary type switch to the solenoid (little) post on your starter, and the other wire to a ground source. This will only crank the engine, so you would need an additional switch, or the actual ignition switch to switch on the accessories, and the ignition system.

there is a single red wire on the end of the starter, use a test light and see if it lights when you have the key in the crank position,also if the ignition switch is bad if you wiggle the key while in the crank position this will help if it is in fact the ignition switch itself.

Need to disconnect battery, then remove airbag, the steering wheel (mark before removal), then remove top and bottom sheering column covers, then the spiral spring. At this point you will have access to the housing where the ignition switch is mounted. there is a breakaway bolt that secures this to the steering wheel. Can use an air hammer and gently loosen. Then you disconnect the harnesses from behind. Continue by sliding the housing off and then you will have access to the screw that secures ignition switch in place.
Install is the reverse.