Trying to revive a 5 cyl 1993 eurovan after someone hooked up battery cables backwards and fried the electrical system. i replaced a distributor, and i get readings that there is current all the way thru. but no spark is being sent to the plugs and it wont turn over. im too far from a dealer to use a diagnositis too. help!
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Many of today's cars have more electronics than mechanical items anymore. Rather than the old point-to-point wiring that was the norm, now the cars use computerized serial data buses to transmit control signals and the like. Hooking the battery of backward is a big no-no on these systems as it fries everything since the protection circuits aren't designed to ward off such errors. If you are having multiple electrical issues after a battery "backward boo-boo", you're best taking the car to an auto electric specialist and explaining what happened. They can assess the level of damage and can tell you if it may be cheaper to replace the car than repair it......
worse case scenario: you could have fried the ecu / ecm
anything electrical is effected; had a neighbor's car whole front end wiring to his headlight system got fried/melted together
do you have access to an obd2 scanner and plug it in to check?
in hindsight, this is one of the reasons why calling AAA for a jumpbox is better than having someone hook up jumper cables incorrectly ~ most also will connect the cables directly to the dead car's battery terminals when you're really supposed to connect it to "engine ground"
once you gave it a look over all the electrical wiring and fuses, time bo bite the bullet and take it to the shop ~ sadly
Hello Glen, Bad bad things can happen when you hook up a car battery backwards. If your car has a high quality electrical system it might only blow out one or two main fuses. If not, it can cause havoc on the wiring system and burn out the alternator, computer, sensors, modules, and stereo system to name a few.
Sorry to say, sounds as if you had cables hooked up backwards, or possibly just had very poor connection between battery and battery cable terminal. If you may have had jumper cables connected backwards, you may have fried some electrical component. Get someone to read the codes which are making the check engine light come on, and perhaps this will give a clue as to what component is blown. Could have damaged anything from a small sensor to the main computer, in which case I would check with salvage yard for a used unit. The main computer is quite pricey.
check your postive battery cables that model should have 2 cables at the postive with a spacer between them they are famous to corrrode under the red covers requiring the ends to be replaced or the whole of both to be replaced if corrosion has traveled down into the cables
It sounds like you either have a dead short or the starter is stuck in the engaged position, whitch if it is stuck, it will cause a spark when trying to connect and if it was previously in that condition, it would also run your battery down and possibly fry something else.If it seems to act like the starter is stuck, it could also be a locked up engine but I do not know the whole scenario. If your talking jumper cables, not to be smart, they could be backwards. I also ran into one incident with a blemished battery that the top of the battery was labeled wrong and the posts in the battery were backward which caused extensive damage which the battery mfg. covered.
if you connected the battery properly(red to positive, black to negative) there should be no problem even if the connections arced. if you hooked it up backwards you may have fried all the electrical in the car. does anything electrical work? does the car run?
I bet you saw some dramatic sparks when you hooked the jumpers up backwards!
The good news is that if your ignition switch was turned to the "off" position when this happened, the fix may be simpler and cheaper than you think. This car has one or more "fusible links" in its primary wiring. They may look like a thick piece of wire, but they act as super-fuses in the the case of large-scale power shorts and the like. Fusible links are typically in-line, so you won't see them in either your under-hood or under-dash fuse boxes. If you're lucky, you blew a fusible link right off the bat, saving the rest of your electrical system from serious harm.
If your ignition was turned to the "on" position when the battery was hooked up backwards, you have a more serious risk that you damaged your on-board computer. However, even if your computer were fried, your dome light, your hazard blinkers, and probably your headlights and turn signals (different circuit than the hazard lights, believe it or not, even though it's to the same bulbs) would continue to operate.
I'm going to recommend that you should check for one or more blown fusible links. Good luck!