Question about BMW 325

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Just pulled the head for repairs and re-installed it back in the car. Hooked everything back up. Connected the negative terminal to the battery and then the positive terminal. When the positive terminal was connected the starter began to spin, but only the starter. The solenoid did not engage the starter to the flywheel to turn the motor over. The starter just started to spin. Pulled the small contact wire that comes from the Ignition switch. Re-connected the positive battery terminal, Starter began to spin again. Pulled the two hot leads from the starter Re-connected the positive battery terminal This time starter did not spin. Pulled the starter and took it to electrical shop with a starter test bench. The starter tested out fine. I am at a loss as to what to check out next or what could be causing the problem

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  • Richard Scordino May 11, 2010

    Internal contact "wheel" inside the solenoid cover may have gotten stuck



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  • 15 Answers

Most likely have a wire pinched , or crossed . i bet the first

Posted on May 25, 2009


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What is killing my battery , battery light on, everything working on vehicle, took positive post off and still runs, so give some feedback..

You may have gotten lucky this time . That's a trick done in the 60's before transistors were used on vehicles an before PCM/ECM controlled charging systems . If you don't know maybe you should take it to a ASE certified repair shop .

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What is the negative and.positive pin on the battery?

The battery terminals have a plus (+) and minus (-) symbol somewhere near the terminal studs. If you cannot find them, use a multimeter set to a proper DC Range. Place the probes on the studs. If the meter reads the voltage, then red probe is on the positive terminal, if the meter pulls backwards the black probe is on the positive terminal.

If using a digital multimeter, a (-) says that the red probe is on the negative terminal.

Mark your battery with a Sharpie somewhere to show the terminal studs.


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I replaced the clutch which required the motor to be removed. After making the repairs and putting everything back together, the car want crank

Make sure that the battery is charged and good. Clean the battery cables. Make sure you have the positive cable connected to the positive red battery cable and the other end to the starter. Make sure negative cable is connected and tight. Check if you can turn the engine over by hand with a socket on the crank shaft that the motor isn't tight. Make sure all wires are connected to proper terminals and connections. If this doesn't help repost and I will try to help with more solutions

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If the negative cable head is not properly mounted to the primary & secondary neg. cable wires would i loose power to everything as if there was no battery at all?

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How do I replace 1999 vw jetta battery distribution block?

Find the same sizes of batteries, just the battery is secured in the battery rack, installed correctly connected the positive and negative two pile head. Car main attention tighten the screws to prevent slipping or too loose, it will easily lead to positive and negative contact head being oxidized. Keep the trailer coupling and wiring polarity of the battery clean, preferably coated with Vaseline on the positive and negative terminals to prevent corrosion or oxidation.
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Electrical connected directly to the negative terminal

First of all I don't recall any additional wiring or a junction box being attached to the negative battery terminal of a Ford Escort. I do however remember these things being fixed to the positive terminal...

The first thing that should happen is your battery should be removed from the car and fully charged and tested and replaced if necessary. I suggest you note; in the case of a completely discharged battery it is possible to inadvertantly connect the battery charger wrongly and charge the battery back-to-front or so the polarity is reversed.

Once there is a known good battery fitted to the car the correct way around and with any bad connections to or near the battery repaired it will be possible to begin the process of diagnosing the original problem(s).
A car that started with a jump start should now start from the key and the charging system can be tested and repaired if found defective..

I suggest you entrust the work to an experienced person...

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1 Answer

No power

You have probably missed re-connecting part of the electrical wiring- probably missed a ground connection..
Check you have re-connected:-
the main power supply via the fusible link (or in line maxifuse),
the battery negative terminal is correctly grounded to chassis/frame,
the motor ground connection to the chassis or battery negative.

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It shouldn't be,however.....when replacing batteries,or simply disconnecting and reconnecting to clear a code for example,always hook up the positive terminal first and the negative terminal last,and,with the ignition OFF.Infrequently,if a battery is hooked up with the key in the ON position,it can damage the vehicles computer....(PCM,TCM,BCM,etc etc)And the reason for hooking up the negative terminal LAST is to avoid arky sparky's off of your wrench which can also damage the vehicle's computer (s).Try disconnecting both negative terminals of both batteries and let sit for minimum 20 minutes,then reconnect,and see what you have.

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