New S4 NA owner tired of being towed!
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New S4 NA owner tired of being towed!
Hey! I have been a member for a few months, but this my first day posting anything. I have already read a ton of threads from the 2nd gen section, now it's time to start asking some questions. I love my car (when it runs) and i have already had her for about 6 months. She is a white 1988 SE, naturally aspirated, nothing to special I wanted to keep it simple and learn about the motor before I jumped into a trubo. So far I have some awesome memories with car, I've had it towed three times, the first time was the second day I had it, and the most recent time was right after having my daily driver(1992 Nissan Stanza) towed. Thats just the storing of my life when it comes cars, I'm not sure why i like them so much. Up until recently I've had no problem fixing the issues, but now I'm just super confused and can't find any answers through the search. I think it's time to post on the technical page.
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I have some ideas of what it could be, but I am just plain confused now. Any help or suggestions would be much appreciated.
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#8
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The Engine fuse supplies voltage w/key to on for a few items so it should be rather easy to run down the problem. The fuse provides voltage to a Black/White wire and this wire runs to the alternator, the Circuit Opening Relay and the Main Relay in addition to the Lock Up Relay found on automatic transmissions so if your car is not or was never an auto then you have three items to look at. So disconnect the two wire plug to the back of the alternator and start the car and see if the fuse blows or not. With this wire disconnected the alternator will not work so don't go driving around w/o this plug disconnected. If the fuse blows then that is not the problem unless the the B/W wire in this plug is grounding out. If the fuse still blows then disconnect the two wire plug to the Main Relay and also the 4 wire plug to this relay. Then jumper the Black/green wire to the Black/Yellow wire in this 4 wire plug and also jumper the White/Blue wire to the Black/White wire found in this 4 wire plug as well. Doing this will bypass the Main Relay, and start the car and see if the fuse blows. Jumpering these 4 wires as specified will drain the battery if left jumpered so do this just to check if the fuse blows. If the fuse still blows then the problem would be from the other item powered by the fuse which is the Circuit Opening Relay located under the dash and to the right of the steering wheel column (relay and plug are Yellow and Black in color). Again, if the B/W wire to any of these components is grounded out by accident then that would also cause the fuse to blow. So see what happens as you do as suggested above.
One other thing. The alternator output wire runs (Black wire bolted to the alternator) to the engine fuse box and connects to the Main fuse so I would focus on the alternator as the primary cause of your problem. If you unbolt this Black wire "at the alternator" in addition to the two wire plug at the back of the alternator and the fuse does not blow then you isolated the problem. So I would start with this first.
One other thing. The alternator output wire runs (Black wire bolted to the alternator) to the engine fuse box and connects to the Main fuse so I would focus on the alternator as the primary cause of your problem. If you unbolt this Black wire "at the alternator" in addition to the two wire plug at the back of the alternator and the fuse does not blow then you isolated the problem. So I would start with this first.
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Hey I finally found the time to do those tests. The results weren't what i was hoping for. The fuse continues to blow on each test. I'm assuming this means my problem is not related to the alternator. Unless the wires are grounded out by accident, if they were how would I know? What should I look for? I know that this fuse also provides power for the fuel pump, could this be my problem?
Thanks for the help so far.
Thanks for the help so far.
#10
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Hey I finally found the time to do those tests. The results weren't what i was hoping for. The fuse continues to blow on each test. I'm assuming this means my problem is not related to the alternator. Unless the wires are grounded out by accident, if they were how would I know? What should I look for? I know that this fuse also provides power for the fuel pump, could this be my problem?
Thanks for the help so far.
Thanks for the help so far.
#12
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And just to make sure, there are 2 plugs connected to the Main relay that have a B/W wire but the small two wire plug is the one powered by the Engine fuse and not the 4 wire relay plug.
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