I jumped the battery on my 300m. I disconnected in correctly after starting the vehicle. The two ends from the running vehicle connected accidently (stupidity). The car shut down I assume I've blown a fuse or a fuse link. The battery is new. I left the ignition in the on position over night. Should I have a dealer repair it, or is it simple enough for a ******** like me to replace?"
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Re: blown fuse link
Check your fusebox for the ignition fuse. (check em all actually since you may have blown more than one)
I imagine you could easily do this yourself. A fuse puller may be found in thye fusebox (a lil plastic two pronged tool) or a pair of fine pliers will help to pull them out.
There are also electronic relays in your fusebox that can fail under a short-circuit but hopefully the fuse blew first..
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Re: blown fuse link
This is BAD NEWS! On the Computer Equiped Vehicles, If you have this happen it will "FRY" your Computer and will have to take her to the Dealership to Replace the Computer. SORRY-Wish there was a Simpler Answer!
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Normally jump starting doesn't involve disconnecting anything. You put the leads from a good battery onto the terminals of the bad battery and start the vehicle. I hope you didn't put the good battery on, start the vehicle and remove the battery with the engine still running and connect the old one? That is a recipe to cause electrical damage as the charge from the alternator has nowhere to dissipate its excess amps.
Yes, it could be a fusable link. It could also be a blown ECU module (i.e "computer"). Test for 12 volts from the positive cable to the starter. Then check for 12 volts to the solenoid (with someone else turning the key). However, the fact that so many systems went out after the jump, it doesn't sound like a fuseble link to the starter. I'd check for a bad ignition fuse in the _cab_ section of the vehicle; (either under or on the side of the dashboard). It would be worth your time to check every fuse (everywhere) regardless of what it's says it's for. My "best guess" is a bad ignition fuse or possibly even a bad ignition switch. The only problem with the fuseable link theory is that you have affected systems beyond the starter. A bad ignition fuse or ignition switch makes more sense... and hopefully not a blown ECU module.
By the way... The proper way to jump is to start with both vehicles turned off. Then, do not put the negative leads on the batteries, but rather connect them to an engine "ground" location. Then, start the "good" vehicle first, let it run a minute or so, then with the running vehicle at a slightly higher idle (step a little bit on the gas pedal), then the "dead" vehicle tries to start. After starting, disconnect cables on the "good" vehicle first, and do so by removing the "ground" first.
Most important do not guess how to connect your battery leads, they are usually marked RED or BLACK + or - If you don't know find out from a auto service person, the damage that could happen will be major and costly, I have a saying, "Better to ask a silly question than to be sorry" hope you have asked before doing any thing. P
The motor home battery I couldn't teel you but if you're talking about the vattery for yhe charger, it's located in the Passenger side inside the trunk. There is a cover over it that has to be removed to get access to it. If jumping, there are posts next to the battery I believe designed just forr jumping. I would REALLY suggest just charging the motor home batteries or using a different vehicle to use. Have found on your kind of vehicle that sometimes when getting jumped or visa versa That it causes an electrical problem. there is a fuse link in the wiring directly (sort of) from the battery to the alternator. Have seen this fuse link blown a lot and MANY people change the alternator thinking the alt. is bad beause the battery goes dead not to mention the car letting you know thta there is a charging problem.Hope this helps.....
Hard to say without make, year, and model-but check all fuses in the power distribution box under the hood- ignition, alternator fuse, etc.-all of them, the small ones and the maxi-fuses. All fuses are pretty cheap. If you still have nothing, you may need a wiring diagram to check for fusible links that would be power distributors right off or near the battery. Fusible links work much like a fuse, and most have been replaced by maxi-fuses, but many vehicles have both. If there is a designated main fuse, it should be in the distribution block or box under the hood.
These cars are known for having engine related electrical problems that can be difficult to track down. One dead sensor is sufficient to prevent start up .
It is possible that your problem had nothing to do with the jump start or battery replacement.
Without a full diagnosis anyone not able to test the vehicle will be guessing.
One thing I would do is to check your fuse panels for all engine related fuses such as fuel pump, ignition and fuel injection to ensure these fuses are sound. Check all visible wiring carefully including your battery connections. Carefully disconnect and then re-connect the battery at both terminals.
Your best option is to have the car towed to a reputable repairer that is familiar with these cars so he can run a full check and isolate the problem.
Whether you have blown something in the course of jump starting the car is unknown.
In future, when jump starting these older vehicles always turn the headlights on and do not turn them off again whilst the vehicle is running until after the spare battery used for the jump start has been fully disconnected. Everything else should be off.
Try disconnecting the battery, but before you do that look in your manual to make sure you disable the security lock to the radio if it is activated. That way when you reconnect the battery the radio will work.
The slamming of the hood may have shocked the relays and the ecm may need to be reset. I know it's a shot in the dark but i'm just limited to what happened. Did you check the fuses?? You may have a bad fuse from trying to boost another car, if your car was not running.