Help identifying problem starting hyundai excel 1996
Sounds like a problem with the wiring between ignition switch and the starter. Something like a weak connection, an obstinate switch that is old and sticking, or a component that is starting to fail. There aren't that many parts in the starting circuit, but until you find the problem, you may end up checking them all. If all other electrics are good, then it is confined to the starting circuit-which starts with the start wire out of the switch, and ends at the starter solenoid on the starter. With a test light or a voltmeter, one could begin at either end and trace the signal through the circuit. Easiest, I guess, is take a test light grounded to the engine block or to the negative post on the battery, and check for power on the small wire at the starter solenoid while someone holds the key in crank position. Do this when you turn the key and nothing happens, starter won't turn. If you have power there when the starter wont work, pretty obvious that the solenoid is not working all the time-they do get old and worn, and will stop working. The starter will have to be removed to replace the solenoid-some people just get a new starter with new solenoid attached and ready to install. More expensive than just a new solenoid, but then you don't have to change out the solenoid on the starter.
OK, go back to test: the car won't start, you check for power to starter solenoid with the key in start position, and you find no power. Now it gets more complicated: a wiring diagram for your excel may be needed. Generally, the hot start wire exiting the ignition switch will carry the signal through a starter relay and a clutch switch (on manuals, on automatics it would be the park/neutral switch and possibly an inhibitor relay-depending on the wiring set up). A tech or mechanic would begin by making sure the start wire out of the switch shows power in start. If not, replace ignition switch. If good, follow the wiring diagram to the next part, maybe the starter relay, and see if the start signal is still good. Pull the relay out and use your test light: with the key held in start, probe all terminals of the relay. Two should have power. One would be your start wire, the other would be the (hot at all times) feed for the relay. You could tell which is which by finding the one hot terminal when key is not in start. If only one terminal at relay is hot, and it is the feed for the relay, go back! Start signal is already lost. If the feed wire is not hot, check battery connections. If good, the feed wire would come from a fuse link just off the battery or a maxi-fuse in the distribution box under hood. If you have two hot terminals, follow the start wire on towards the starter solenoid-you are done with starter relay, unless there is a problem there with the relay itself or the other two terminals at the relay. One terminal would carry the feed wire on towards the starter when relay is energized. The other terminal may just go to a ground or it may ground through the clutch switch If you are good to this point from the switch, you would just continue checking based on your readily available wiring diagram-hah! But really, you could find a diagram in a repair manual-check your library. These can be very frustrating problems, sometimes hard to find, sometimes easy. Post back if I can be of help. Good luck.
May 28, 2013 |
Cars & Trucks