Repair And Fix it

home» 1990 » 535i » a » bmw » how » jump » start » to » How to Jump Start a 1990 535I BMW

---

How to Jump Start a 1990 535I BMW

The battery in a 1990 5-series BMW is designed to be a reliable as the car. There are occasions, however, when the battery goes flat. It usually comes as a surprise when the engine doesnt fire at the turn of the key. For this reason, its a good idea to know how to safely and correctly jump start your BMW. The battery on this model is located under the back seat, but the jump-start position is under the hood. Its marked with a one-inch plastic "plus" symbol. You will need another car with a live battery to do the job.

Instructions

1




Determine that the battery is the reason the engine wont start. Turn the ignition. If the engine cranks, the battery is good. If theres silence or a ticking sound, the battery is faulty.

2




Turn the ignition off. Lift the hood of both vehicles. Locate the positive post under the hood of the BMW 535i. It connects to the clamp of the positive (red) cable. Attach the clamp on the other end of the red wire to the positive terminal on the booster vehicle.

3




Attach the negative (black) clamp to the negative terminal of the booster battery. Attach the other negative clamp to the engine frame of the BMW to complete the circuit. Any unpainted metal surface will suffice. Just make sure its away from any moving parts.

4




Start the engine of the booster vehicle. Wait at least 5 minutes for a charge to build up. Start the BMW. If it starts, move on to the next step.

If it fails to start, wait another few minutes and try again. If the car still fails to start after 30 seconds of trying, call a professional mechanic. The battery might not be at fault, and further tries could damage your engine.

5




Remove the cables in the reverse order they were attached: the BMW engine frame first, and the booster batterys red terminal last.

6




Drive the BMW to a location where you can safely remove the battery and attach it to a battery charger for at least 12 hours. The vehicles alternator will provide some charge to the battery as you drive, but this is not its primary function.