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Old 11-07-2002, 02:27 PM
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Join Date: Nov 2002
Posts: 8
1989 300 SEL Fuel Pump and relay question. Please help me!

My 1989 300 SEL started having intermitent starting problems. Being the parts replacing person that I am instead of trying to be a mechanic I purchased a fuel pump relay. The funny thing is that the relay I took out reads: Klima 6 Zyl . The relay they gave me does not say this. It actualy says it is a A/C compressor on it. All the pins and numbers are the same so I will assume that it is the right part. I put it in and nothing. Next step, take off fuel pump. Big fun draining the tank. ( it was full of course ) 18 gallons later, I took of pump and filter. Ordered pump and filter form Car Quest and they showed up but pump was wrong. Filter was a little smaller in diameter but fittings are same and it appears that it will work. They gave me back my old pump and I decided to coonect it straight to the battery. Seems to work just fine. ( should have done that from the start ) The filter though by trying to blow thru it seemed completely clogged compared to the new one so I think I found my problem.

Did I burn out my new relay by trying to hook it up with a clogged filter? I have read that I can jump the pins on the relay to make it work as well. My relay reads as follows: GK- GK+ 87 15 31

Can anyone tell me the proper way to jump this relay? or should I even be doing that?

I appologize in advance for being a dumb ass for my bass ackward attempt at fixing this. I should know better.


I picked up this beauty last year. Completely clean 1989 300 SEL
Black on Black , excellent condition in and out. 180,000. $5000.00
Did I do pretty well?

One last note. I used this forum to daignose and repair my mono valve problem. Worked like a charm. Thank you so much for this forum!

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Old 11-07-2002, 04:38 PM
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Join Date: Oct 2002
Location: Colorado Springs
Posts: 481

When you say intermittant starting problems, does this mean it would not start then would after a couple of tries.
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Old 11-07-2002, 04:54 PM
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Join Date: Nov 2002
Posts: 8
The problem was intermitent. I would open the hood and tap on the relay to get it to work again. That solution worked less and less until it just would not start again. I feel pretty good about the filter being clogged. I think I blew my new relay because I hooked it up to the clogged filter. Thanks for your help.

I would like to know how to jump the relay to se if it works.
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Old 11-07-2002, 04:58 PM
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Join Date: Oct 2002
Location: Colorado Springs
Posts: 481
intermittant start

sorry thought it might be the old pressure leak down.
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Old 11-07-2002, 06:58 PM
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Join Date: Sep 2002
Posts: 3,069
I don't know about anybody else, but where I come from the Klima relay is to shut down the A/C compressor in the event of belt slippage, overheat, etc. Isn't there another relay next to that one that looks just like it? The fuel pump relay should have the RPM cut-out on it. Sockets 7 & 8 are the ones you need to bridge to run the pump(s), but make sure you have the correct relay installed before you do anything else!
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Old 11-08-2002, 01:47 PM
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Join Date: Nov 2002
Posts: 8
Ahaaaaaaa said crystal with the glass eye! It would seem that you are correct. It would appear that I have needlessley purchased an A/C compressor relay. It should have been the other ciggerette shaped black box.

I tried to pull that relay out and it does not want to budge. I managed to pull the plastic cover off of the relay while it is still in the harness ( that's how hard I was pulling to get it out! ). I can see that it has 2 relays in it so I guess that is the right one ( fuel pump relay? ).

Why is that sucker so stuck in there. I did not want to force it out of there. Is there some sort of retainer or should I just grab that thing and pull straight up?

Any advise would be greatly appreciated!

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