battery connection screw up |
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battery connection screw up |
dt4 |
Jan 12 2020, 09:57 AM
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#1
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Senior Member Group: Members Posts: 502 Joined: 26-May 19 From: England Member No.: 23,161 Region Association: England |
I have had the battery off the car whilst stripping paint and priming etc.... but thought it would be good to turn the engine over and run it for a while to keep things in good health etc.....
I had the battery on the bench to charge it and then put it back in the car but very stupidly put the negative lead to positive terminal and positive lead to negative terminal. I didnt turn the key as I was checking other things when I realised what I had done. I noticed that there was a smell of smoke coming from the alternator area and the tin on top of the engine in that area was warm so suspect there is a connector to the alternator under there? I put the terminals on the right way around and tried to start the engine but it appeared the battery had drained? I recharged the battery overnight but wouldnt start, again the battery seemed low on charge Apart from seemingly screwing the battery, is there other damage likely to have occured cheers David |
dt4 |
Feb 10 2020, 07:23 AM
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#2
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Senior Member Group: Members Posts: 502 Joined: 26-May 19 From: England Member No.: 23,161 Region Association: England |
so the latest...
I tracked an alternator down over here and fitted it at the weekend With the ignition on I can hear the fuel pump running at the front, when I turn the key to start it is very slow to crank and is not firing, its as though the battery is virtually flat I swapped out the battery for a spare that I believe to be good but the same result. Looking for suggestions as to what else to check please I am an electrical numbskull and whilst I have a circuit tester I have no clue how to use it. |
ctc911ctc |
Feb 10 2020, 09:13 AM
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#3
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Senior Member Group: Members Posts: 892 Joined: 9-June 18 From: boston Member No.: 22,206 Region Association: North East States |
Think of the electrics as "Plumbing for Electrons" all of the connections need to be tight and clean or you will have 'leaks'.
I would start with all of the POWER connections. Start with the battery ground. How solid is the metal around the connection on the side of the engine compartment? If the lug on the compartment wall is connected to rusty metal, in essence, this is one big resistor and the NEGATIVE needs to be SOLID and consistent at every point it is used. On this, a VOM might show zero ohms between two chassis points, however, when 90+ amps are being drawn, the current flow characteristics can change. RUST or loose connections. Clean the Negative connection! Super clean and tight. On the Positive (+) side, the cable from the battery to the starter must be in good shape. As a question of maintenance, many people replace this cable for a variety of reasons that have to do with age of a plumbing part and it getting leaky. Make certain that the connection from the battery to the starter is solid, clean and tight. The starter, of course, has two components - solenoid and the starter motor. if you are certain the cabling is solid - replace the starter. Let us know how things turn out! so the latest... I tracked an alternator down over here and fitted it at the weekend With the ignition on I can hear the fuel pump running at the front, when I turn the key to start it is very slow to crank and is not firing, its as though the battery is virtually flat I swapped out the battery for a spare that I believe to be good but the same result. Looking for suggestions as to what else to check, please I am an electrical numbskull and whilst I have a circuit tester I have no clue how to use it. |
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