I don't believe there is a fuse, just that relay. Can you hear the pumps running when you turn the key on? It should run on one pump. You can just try either checking for power at the pumps with the relay jumped or try jumping power and ground to the pumps and see if they run. Could be a wiring problem, plugged filter, lots of things. Are you 100% sure there is fuel in the tank, wouldn't be the first time someone went through a lot of work due to an empty tank, usually accompanied by a broken fuel gauge.

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When I jumped the pumps, I could not hear them running. I will try jumping them again. I will also double check the fuel, the guage shows 1/4 of a tank.

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Could also carefully loosen the pressure hose at the fuel distributor and see if it seems pressurized. Did you reset the trip meter the last time it was fueled?

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No I have not reset the trip meter? When I jumped the pumps, I could not hear them running.

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Here's an idea: On a piece of paper, write down the number of hours you have invested troubleshooting this problem. Now, multiply that number by $80 (auto repair labor rate). Now, add to this figure the amounts spent on used parts which appear to have not solved the problem. This number represents your financial investment at this point in time and your car is still inoperable.

I know a top notch auto A/C repair technician who charges a one time $80 fee to perform a diagnostic exam of a vehicle. The resulting report tells the customer what exactly is wrong and what is right and includes an estimate of repair costs. I've actually been in his shop and watched and listened to a woman and her father interact with the shop owner. Seems they had taken their rather newish Honda Odyssey to a well-known national repair chain and received a $900++ repair estimate for repair of the A/C. The tech/shop owner explained that unless they opted for the $80 diagnostic service, his hands were tied and he was unable to offer an opinion as to what was wrong with their vehicle (DUH!!!). Out of the clear blue, the woman's father who had been texting on his cell phone pops up and says, "WE JUST WANT TO KNOW IF THE NATIONAL BRAND REPAIR SHOP IS OFFERING US A GOOD QUALITY A/C COMPRESSOR!!!". Again, the tech/shop owner demurred and informed them that without a thorough diagnostic exam he could offer no opinion. Amazingly, these two losers declined the offer to spend $80 for a diagnostic investigative report which could have easily given them additional information from which to make an informed decision. Idiots.

Forum members,

I jumped the pumps again and was able to get them working. They must have been frozen and only needed a nudge to work. Even my FPR is working fine now. Thanks for all the advice, and thank you Husky Man for your repeated post.

Ron

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I tried that, my pumps ran but were broken internally. Hopefully yours stay strong.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

If not have a spare setup from the bone yard. I took them off of a solid donor. Thanks for the info so I can keep an eye out.

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Hello everyone. I am new on the forum and I didn't want to start a new thread since I have a very similar situation described on the very beginning of this thread. I bought a '87 Mercedes 560sel, the car was barn found and to my knowledge the car was not started more then 7 years or more. She is not in the perfect condition but I thought maybe she is worth to bring her back to the life. 160k miles, not rusted to bad, original paint and accident free car. So I started with a fuel tank. Disconnected, removed, flushed and installed back. New fuel strainer inside installed. Fuel delivery assembly replaced. New pumps, filter, fuel accumulator and all hoses. Partially replaced metal fuel line, tank to fuel distributor. Was badly rusted. In the car I found all old ignition cables with distributor cap, rotor and old spark plugs. On the engine all of those components looks very good/ like new so I assume everything was replaced. The car get a fresh gas (around 6 gallons) and new battery. Of course checked fluids (very low coolant) but engine oil looks very good, like fresh. Anyway will flush all fluids when I'll start the car. I can hear the pumps running when turn the key. Disconnected fuel delivery line at the fuel distributor and fuel is coming to the fuel distributor. Now. When I crank she is like she wants to talk, like wants to start but can't. Have an impression like not enough of fuel. I sprayed a starting fluid and the machine started right away and running few seconds until burned the fluid. Checked also the fuel pump relay. (BTW today ordered brand new fuel pump relay.) But no change even with jumper on the pins. So start with starting fluid, no start with fuel. Any suggestions what could be a next step? Where should I put my fingers now? The advice, help will be highly appreciated and thank you in advance for your help. Best regards.

Hello everyone. I am new on this forum and I would like to refresh this thread since I have a very similar situation described in the very beginning of this thread. I bought a'87 Mercedes 560sel, the car was barn found and to my knowledge was not started a seven or more years. She is not in the perfect condition but I thought maybe she is worth to bring her back to the life. The car is 160k miles, not rusted too much, original paint with small scratches and dents ( I think by sitting in the barn) and accident free. So I started with the fuel tank. Disconnected, removed, flushed and reinstalled with a new fuel strainer inside. Fuel delivery assembly replaced. New pumps, filter, fuel accumulator and all new hoses. Partially replaced metal fuel line, tank to fuel distributor due to a bad corrosion. I found in the car old set of ignition cables with distribution cap,rotor and spark plugs. Anyway checked mentioned components in the engine, everything looks very good, like new, the distribution cap very clean inside so I assume it was replaced with new set sometime before. I can hear the fuel pumps running when turn the key. Disconnected inlet fuel line at the fuel distributor and checked the fuel is coming out from delivery fuel line. Of course checked all liquids in the engine compartment. Oil very clean like new, coolant level very low , but all fluids will exchange after I'll start the car. After first crank she wanted to talk, like she wanted start but did not. It looks like she get not enough of fuel. She would like to start but she can't. I sprayed a starting fluid and she started right away and was running a moment until burned down the fluid. Did the same couple times. The fuel pump relay jumped pins with no success. BTW today ordered new fuel pump relay anyway. Start and nicely running with starting fluid and trying but can't start without. Any advices, suggestions will be highly appreciated and thank you in advance for help. Best regards.