Re: Car would not start 300SE 1989, Were is the gas pump...
Yes try the fuel pump relay first, jumping it will tell you whether or not the pump is working. Though you should hear it turn on ( the fuel pump that is) turn you turn the key to the 'on' position.
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Did you check the horn relay! it is in fuse box under hood. God-Bless! if the relay is bad horn will not work. It should be be behind or near the passenger side head light.
you can go to any autoparts, and locate the relay for pumps, they can order from the manufacturer. Ross autoparts you can ask them OR http://www.kennyross.com/
check fuel pump relay isnt bad if it is replace it check fuel pump fuse do you hear pump come on in the back when you turn the key without starting car pump in back pumps gas to injectors underhood if pump in back isnt working then start with the easy things first pump relay its underhood in fuse box under hood marked fuel pump relay then you may have a fuel pump fuse inside the car check theses first
There is a fuel pump relay with fuse under the screwed down cover area connected to where the fuses are. I would guess you fuel pump is out though due to age and use. It was probably very loud if you could actually hear it before and then they just die. Try autohausaz.com for some of the best prices I have seen. Remember to get the check valve and fuel filter also. You can "hot wire" the pump to see if it turns on but I wouldnt suggest it.
Underneath your hood, behind the passenger side headlight, behind the core support, is a bank of 2-8 relays. One of those relays is the relay needed for your fuel pump. There will also be a fuel pump relay fuse located there. The relay designation should be on the cover of the relay compartment.
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