Question about 1985 Mercedes-Benz 300

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1985 300sd. replaced the battery but the electricity goes out

When I turn the ignition switch on the car the power goes out. when i try to start it again there is no power at all. It sits for a while and the power comes back on but it only repeats the cycle. HELP??!!!!???

Stuck in a cycle....

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Hello,
Make sure that your battery is good first. I have seen them go bad in a way that as soon as you start pulling power they short out and die.

If your sure that the battery is good, make sure that you battery cable ends and battery are clean. Also, there is a terminal block that is about 3/4"X2" located on the right fender apron that distributes the power. Check these connections to make sure they are good. Check the negative battery cable at the fender apron where it it bolts up. Check the ground strap that bolts up to the left side of the transmission bell housing to the body.
If all of these things are correct, you probably have a bad ignition switch.

Fixya?
Thanks, Gator241

Posted on Mar 06, 2009

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Rapid clicking noise when trying to start the engine?


Hi There,

You turn the key to start your engine and....
a series of rapid clicks. Your car won't start. What's going on?

That clicking noise is your starter solenoid.

Your starter needs a lot of power to turn your engine. That much power would melt your ignition switch in no time if it passed directly through it. So what happens instead is your ignition switch actuates another electric switch called a solenoid. The solenoid is a really HEAVY DUTY switch.

Inside it are two copper contacts that look like the head of a bolt only rounded. The battery is attached to one, the starter to the other. Hovering above them on a spring is a copper clad disk attached to an iron core. The iron core is inside an electro-magnet.

When you turn your key (in a perfect world), an electromagnet is activated that yanks the disk towards the contacts (Making a single decisive healthy CLICK). When they connect, the circuit is closed and the starter turns over. OK.

When things go wrong:

Low Battery:
  • The solenoid requires power to actuate.
  • The starter takes a lot more power to turn the engine.
  • When the battery is low, there isn't enough power to do both.
  • You turn the key, solenoid engages (CLICK)
  • Power goes to the starter
  • The starter tries to turn the engine
  • The draw from the starter drops the available power below the minimum needed to keep the solenoid engaged.
  • The solenoid disengages
  • The starter is no longer drawing power
  • The additional power allows the solenoid to re-engage (Click)
  • Repeat the process for as long as you have the key turned. (CLICKCLICKCLICKCLICK)
That's where those clicks are coming from and why.

The remedy:
Short term - Jump start
Long term - Charge or replace battery.


I wanted to explain what was happening rather than just saying 'dead battery, replace it'. That way you can judge for yourself whats going on.

Best regards
Mike

on Apr 20, 2010 | Ford F-100 Cars & Trucks

1 Answer

I have a 2002 polaris magnum 325. I put a new starter, ignition switch, relay that goes to the starter and a new battery. It will turn over, but won't start. The starter is engaging also. It will pull...


Since you can start with the pull starter, and not when you crank with electric starter, assuming this machine has electronic ignition it is quite possible that the battery lead in not making good contact with the battery and there is a big voltage drop low enough to affect the ignition system due to the high current drawn by the starter. Try cleaning and retightening both battery leads and the ground lead. Also check the power cable running to the ignition system. Also check for corrosion near the ground connection on the chasis.

Jun 29, 2014 | Cars & Trucks

2 Answers

Wife goes to start our 1991 Dodge Shadow and nothing. headlights work, dome lights etc. but anything that is tied to the ignition won't work. So I have been trying to find out where the ignition switc


It is on the steering column, below the ignition lock cylinder.
Before changing the switch, pull the electrical connector apart for the switch, and check for a power signal into the switch.
Probably a fusible link off the battery supplies power to the switch. Check that you have one hot wire going to the switch-one wire should have power available on it at all times. If no power to switch, check fusible links. If there is power available, then go ahead and replace the switch.

Nov 26, 2013 | Cars & Trucks

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I try to start my Lincoln town car and when I turn the ignition on the electrical battery system goes down but won't turn over. I have installed a new car battery


You would need to take a meter or test light and check for power after the battery. You could have a bad connection inside one of the cables.
There should be 12 volts at the battery post and at the cable end on the starter. Also be sure and check the ground connections.

Jan 30, 2013 | Lincoln Town Car Cars & Trucks

2 Answers

Won't start


How about corroded battery cables (internal)

Fusible Link wiring corroded & open circuit,does
everything electrical work except the starting circuit?

Turn key & have power to starter solenoid ?
Neutral Switch !
Ignition Switch !

Tough to guess without wiring diagrams,
to see where to start testing

Can't fix what you don't know you have

Oct 02, 2012 | 1990 Ford F150

1 Answer

Lights come on but the car wont start


clean your battery terminals and all grounds to the battery cables and check if the battery has 12 volts to 14 volts if not charge the battery then load test it.
if the dash red lights go dim when you turn to start position your starter is bad or your battery is too low. You can have someone hold the key in the start position while you tap the corner of the starter housing and see if it turns over. The starter bushings are worn if it turns over.(needs starter replaced)If it does not go dim then the problem may be in the electrical switch for the ignition. The switched power to the starter solenoid comes directly from the ignition switch to the starter solenoid (purple) Test if you are getting power to the starter.
If not then check from the ignition switch mounted to the steering column. Make sure you pay attention to which wire goes to which post if you remove it for a bench test. If you get them backwards it wont do anything. .If oil leaking on the starter you will want to fix the oil leak so it doesnt ruin the starter probably valve cover gaskets leaking oil.

Dec 12, 2010 | 1985 Chevrolet Caprice

2 Answers

My car stalled. I saw that my 25 amp engine fuse was blown. i replaced it and everytime i turn the ignition it will blow my fuse again.does anyone have a suggestion?


Something major is damaged. I suggest putting a circuit breaker in place, for diagnostics, then follow wiring with an inductive Amp meter to locate the problem area.

Sep 03, 2010 | 1996 Chrysler Town & Country

2 Answers

I think my starter motor has gone? my car wont start unless i pus it and kick start it in gear. Is it the starter motor gone or battery playing up??


hi...

both may be the reason for not starting.

11.please check the terminals from the battery,wires and all in good order.then check the volt comin to the starter motor if the volts are correct then the problem is with the started motor. please service or replace with the new motor.

2.if no supply is comin to the motor terminla then ther is a problem with the wires.the wire is damaged so no power goes to the motor.

3.if the voltmeter/multimeter reads less reading then the problem is with the battery.the charge is not sufficient enough to start the motor. please recharge or replace the battery if required.

if my information was usefull please vote

Jun 26, 2010 | 1997 Volkswagen Golf

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