Re: Fuel pump test: how jumper fuses? - Saab 9000 Bulletin Board - Saabnet.com
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Re: Fuel pump test: how jumper fuses?
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Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Mon, 6 Feb 2006 10:27:26 Share Post by Email
In Reply to: Fuel pump test: how jumper fuses?, SavannahDan, Sat, 4 Feb 2006 18:35:16
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Two ways (at least)

On the side of the fuse that is facing you (with the numbers stamped), you'll see a little cutout in the top of the fuse over each leg. You'll see bare metal. If you take a wire and touch that bare spot on one fuse to the bare spot on the other fuse, you'll have jumpered them.

Yes, it's tough to hold the wire there and still be at the back of the car to listen for the pump. But if you fold the rear seats down and leave the cargo cover off, you should be able to hear it while kneeling in the passenger footwell.

In the other method, you pop out the fuses and jumper the hot side of fuse 22 to fuse 14. This requires you to know which is the hot side. When you pull the fuse out, you break the circuit. One side has power, the other doesn't. If you have a voltmeter, pop fuse 22 out, and measure the voltage (to ground) of each connection. One will be 12 volts, the other 0 volts. 12 volts is the source. Note which side of the fuse that is (right or left). Now, pop fuse 14 out, and stick one end of the wire into the OTHER side from the hot side on 22 - if there was 12 volts on the left side of fuse 22, stick the wire into the RIGHT side of 14 (load side). Then stick the other end of the wire into the hot (12 volt) side of 22.

Why not stick it into fuse 22 first? Because now you have a wire with 12 volts on it waving about, unfused.

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