I reversed the battery connections on my 2000 BMW 740il. I replaced the alternator, battery and replaced three fuses. The main fuse checks out to...

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Hi Greg,

Seems like all parts that you have mentioned are already replaced by you. In some cases, the TPS (throttle position sensor) is also affected and also the fuel pump. You can easily test the fuel pump  normally when you turn the key to on position you will hear that the fuel pump is priming. If you can hear it primes, then you dont have to worry about that. Check the TPS or replace it if necessary.

Let me know if you have further questions. 

You can test the fuel pump by using a fuel pressure test gauge. You can ask a mechanic to go to your place and have him test the fuel pum using the gauge. 

The throttle position sensor for the your 740il is located on the throttle body housing Right next to the engine oil dipstick.

Let me know if you have further questions.

Check the rear righ hand side of luggage compartment.

Let me know if you have furhter questions. 

Are you looking for the fuel pump fuse? 

Alright #17 is for the fuel pump fuse. Theres no other fuse location other than thr trunk and the engine bay. Have you check the engine bay? 

Hmmmm... the relay should right there at the ride side of the compartment. Have you tried removing the carpet sidings it should be underneath it.

Here's the user manual of your vehicle. Go to page 181 and you will see there how to remove the trim panel to reveal the fuse box.

file:///C:/Users/Home/Downloads/2000-bmw-740il-17573.pdf

Sorry here's the link.

https://carmanuals2.com/get/bmw-740il-2000-owner-s-manual-17573

Just click the download button if you are already in the site. 

Alright Great.

Anything else that I can assist you?

Dear Greg, It was a pleasure helping you with your BMW issue today. Here is a summary of the resolution.
Issue identified : cx reversed the battery connections
Solution Implemented : chat with cx and told him to check the fuel pump and TPS as well. cx looking for the fuse #57 fuel pump relay. Provided cx the location of the fuse and provided also that manual of the vehicle. Answer accepted. 
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