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Jeep Wrangler YJ
YJ General Discussion
95 YJ crank, no start
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<blockquote data-quote="Mike187" data-source="post: 440984" data-attributes="member: 21419"><p>So......</p><p>I took the wiring diagram and went at it Saturday. Fortunately, I had a friend that's well versed in electrical stuff to help.</p><p>Cleaned all the body grounds and battery terminals/ connections, just to play it safe. took power distribution box apart so that we could access outgoing wires and make sure that if something was showing that it was getting power, that it was going out as well. Checked ASD relay, cofirmed relay was good. confirmed that it was getting power when key on... which it was. Then checked to make sure that when ASD got power, that fuel relay also gets power...which it does. </p><p></p><p>This was key, as then I knew that the fuel pump circuit was powered, it just wasn't making it to the pump. Then checked the car side of the plug at the fuel pump. 12 volts w key on.... plug fuel pump back in, turn key on... pump kicks on for 3 seconds. Turn key to start... Jeep starts. </p><p></p><p> Long story short... The plug on the car side of the fuel pump was bad. Looked brand new, tested positive for 12 volts every time I checked, but when plugged in, it only connected w fuel pump plug "sometimes". </p><p>After it started, we found that if the plug was wiggled, it would die. If held in one position it would stay running fine, but if we pushed on it, would cut out. I ended up cutting both plugs off and put connectors and shrink wrap on the wires.... Have put 120 miles on it since Saturday, running like a top.</p><p></p><p>Thanks for the advice all.... Glad to figure this one out.</p><p></p><p>Mike</p></blockquote><p></p>
[QUOTE="Mike187, post: 440984, member: 21419"] So...... I took the wiring diagram and went at it Saturday. Fortunately, I had a friend that's well versed in electrical stuff to help. Cleaned all the body grounds and battery terminals/ connections, just to play it safe. took power distribution box apart so that we could access outgoing wires and make sure that if something was showing that it was getting power, that it was going out as well. Checked ASD relay, cofirmed relay was good. confirmed that it was getting power when key on... which it was. Then checked to make sure that when ASD got power, that fuel relay also gets power...which it does. This was key, as then I knew that the fuel pump circuit was powered, it just wasn't making it to the pump. Then checked the car side of the plug at the fuel pump. 12 volts w key on.... plug fuel pump back in, turn key on... pump kicks on for 3 seconds. Turn key to start... Jeep starts. Long story short... The plug on the car side of the fuel pump was bad. Looked brand new, tested positive for 12 volts every time I checked, but when plugged in, it only connected w fuel pump plug "sometimes". After it started, we found that if the plug was wiggled, it would die. If held in one position it would stay running fine, but if we pushed on it, would cut out. I ended up cutting both plugs off and put connectors and shrink wrap on the wires.... Have put 120 miles on it since Saturday, running like a top. Thanks for the advice all.... Glad to figure this one out. Mike [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
95 YJ crank, no start
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