PLEASE NOTE: Wire color may be all red or all black (depending on stock on hand) . Performing some fuel pressure tests on your K-jet or KE-jet engine is safer and less of a hassle with the engine NOT running. The only way you can do that is to find a way for the fuel pump to run all the time while doing the test or any adjustments. When you turn the key on, the pump will only run for a few seconds and then shut off. There are at least two ways you can get the pump(s) to run constantly. On the 560SL, there are three ways. Let Kent explain in the video below: PLEASE NOTE: We now offer only one power lead setup for both single and dual fuel pump models.
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Instructions: Run this single wire from the positive terminal on your battery to the back of your car where the fuel pumps are mounted. Find the positive leads on the fuel pump ( not the brown wire, as it is ground). Leave the button off when doing this. Remove the one OR two factory power wires at the pump(s). Clip one or both ends with two alligator clips to the one or two pump terminals. Clip the other alligator clip onto the positive post of the battery. Turn the button on and listen for the whir of the pumps. If it runs, you are hooked up correctly. If it does not run, switch it off immediately and make sure you don't have the wires crossed.
The switch is located next to the fuse at the end that connects to the battery, allowing you to turn the pump or pumps on and off at will.
One end has a larger clamp to hook up to the positive on a battery or battery booster ( disregard the colors of the clamps on each end of the jumper).
In version 2, we added a fuse to protect your pump(s) in case of improper hookup and short circuit. If you are not getting power to your pumps, be sure to check the condition of the fuse. Either a 5 amp or 10 amp fuse can be used.
The 13.5-foot-long jumper wire will ship in either red or black, depending on supply issues. You use only ONE wire from the battery to the fuel pumps, so there are no polarity issues, and the color does not matter.
PLEASE READ CAREFULLY BEFORE PURCHASING: We will provide general instructions, but we are not able to give specific fuel pump relay locations for each model from 1976 to 1993 ( a couple of examples will be shown ). We will not supply you with the pin numbers you need to "jump" with this wire on your model. There are too many variables. Keep in mind YOU can find this information if you do a thorough and deep internet search. If you can find a PDF of the printed service manual, you will have this information along with the pressure test values you will need when pressure testing your car's fuel injection system.
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