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Re: I need a fuel pump wiring diagram for a 1993 Jeep...
I don't have an isolated diagram but if you go to this link you can have the entire schematic! http://www.scribd.com/doc/18999822/Jeep-Wiring-2 Get out your glasses and have fun!!!
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Grand Cherokee isnt have "fuel reset switch"; if you have a problem there, could be a fuse or wiring problem in the cricuit; also could be fuel pump itself. If you need other details, just ask, we have 1993-'98 Repair Manual.
A non working fuel pump in those early year Grand Cherokees is usually either a bad pump or an ecu in need of repair. Make sure that the check engine light comes on, on the dashboard, when you turn the key to on. If that check engine light does not come on, the ecu is bad. If it does come on, more than not the fuel pump is shot and will have to be replaced.
Most often a relay will act like a buzzer if it is not properly grounded. The ground signal generally comes from the computer. The auto shutdown realy feeds the fuel pump relay and therefore is shutdown relay isn't getting the proper signal it will in turn send same improper signal to pump relay. I am sending you a decent diagram of this and suggest you first make sure all body grounds are clean and secure. http://www.scribd.com/doc/18999822/Jeep-Wiring-2 Good luck!
What you brought is an tank and unit from 1995 JGC. from 1993 till 1995 they have the same fuel pump. 96'er Jeeps start with OBD - Systems and they have other fuel pumps. You can't change the plug ins, because you may have other fuel filter in your Granny. Check filter and fuel lines if they fit with the unit you brought. If not, you need another unit from a real 96'er Jeep
good morning to you and welcome to fixya.com. hope we can get you fixed here. just a couple of questions first? have you changed the fuel pump yet? if so where did you buy the pump from? your pump is actually building up to much resistence and is unable to overcome it in turn no power is getting to pump as needed. i have a grand cherokee with 230k so i love hearing that you have that many miles. lets keep you rolling. let me know and ill help you out.
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