![]() If they do, your ignition switch should be ok. When you try to start the car, the lights should either dim (a lot) or turn off completely. ![]() If you're not sure, turn on the headlights. The dash warning lights should turn off at this key position (most cars). If they do light up, turn the key to the start position. If the red warning lights on your dash don't light up (and your battery connections are clean), the ignition switch is bad. Turn the key to the on position (not all the way to start). If you can turn it over, the starter should also be able to (which means you're lucky, it's not one of those big problems).īad Igntion Switch: If your battery checks out, but the starter is still silent, it may be a faulty ignition switch. The only way to check for this is to put a wrench on the crankshaft pulley bolt and turn the engine over by hand. Many things can cause this (hydrolocking because of a blown headgasket, spun bearing, etc.). If the voltmeter is an easier path to the starter than the cable, you will get a higher measurement in the voltmeter.Īnother possibility is that the engine is just too difficult to turn over. Maximum should be about 0.03 volts since it's just a length of copper cable you're measuring.Įlectricity is like water it will take the easiest path. ![]() You need to have someone crank the engine while you take the voltage measurement from the positive battery terminal to where the large positive cable attaches to the starter. Could be that the cable developed too much resistance over the years and now it wont let enough power through. You might want to run a voltage drop test to see how much power you're losing through that positive cable to the starter. We also know it has the capabilityīut is that power getting to where it needs to be (the starter) to enable that capability. By actively helping the moderators with this you ensure that the r/Cartalk community continues to be a worthwhile and knowledgeable resource for car repairs. Report posts and comments that fall outside the guidelines. If you do not take the time to include this basic information your post may be removed until it is revised. By making a good attempt to narrow down where and what may be causing the problem you save those trying to help many steps in diagnosing the problem.** Be sure to also include the year, make, model and engine size of you car in your title, along with your main issue.** For example "2003 Ford Crown Victoria 4.6L exhaust manifold bolts rusted off" would be an acceptable post title. Take pictures, crawl under the car, look under the hood. Attempt to investigate the repair issue on your own. Have as much information as you can about the issue before posting. If you still aren't sure about something you are about to post, please look at the links down below for other subreddits that might be better suited for your question, or message the moderators.* Most repairs have already been covered multiple times somewhere in great depth that will satisfy your needs. * Remember that posting here is not a substitute for using Google. Some examples of things that are NOT GENERALLY ALLOWED: links to articles or videos that are for profit, professional-level body work repairs, detailing or cleaning questions, aftermarket car stereo questions ( /r/CarAV), car reviews ( r/Cars), new & used vehicle recommendations, price comparisons for tires, stereos, exhaust, etc, and especially questions regarding cost of repairs or the legitimacy of a mechanic's quote. It will let you read and reset the codes. You can get a code reader from Amazon that works with 1996 and up vehicles for about $15. They will have a letter followed by four numbers, for example "P1234". You can have codes read at Auto Zone, Pep Boys, O'Reilly's, etc., for free in most states. Get OBD codes! If you have a Check Engine (CEL) or Service Engine (SEL) Soon light on, get the codes read and have them available if possible befoer posting. We're here to help you, but not to assist in negotiating with mechanics (this is business/life advice, not repair advice) or to tell you what car you should buy. Also respect those that take the time to answer questions and remember that many are professional mechanics, who normally get paid very well to diagnose automotive repairs. ![]() Treat those asking for help with respect, and answer without bias toward them, their situation, or their knowledge (or lack thereof) about the repair issues. Post disappeared? Read the following guidelines, and if you think it still is relevant, message the mods to free it from the spam filter. We look forward to helping everyone with their car repairs and questions, but please take the time to read this sidebar. R/Cartalk is the original Reddit auto repair community, with over 650,000 subscribers and growing.
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