1998 s70 Volvo jump started battery and put jumper

In this situation I would check the starter motor solenoid, you are lucky the ECU did not fry cause it would cost more than the car is worth. Starter motor is not that expensive, also check all main relays and fuses. Check the wiring as well. If all fine the ignition coil and ignition barrell would be last. If it is possible plug a computer and run diagnostics too.

Hi. it sounds like you may have a faulty alternator get it tested at a local garage. Match your + and - on the battery terminals .

I had the same problem when my battery went flat and tried to use jumper cables connected to another vehicles battery. I called Volvo and they said I need to disconnect the battery terminal to reset the computer. After re-conecting it the remote control worked again and I was able to jump start the car. Maybe your car's computer went into a similar state.

YOU REPLACED BATTERY.BUT CHECK TO MAKE SURE YOU HAVE RIGHT COLD CRANKING AMPS.AND CHECK BATTERY CABLES.MAKE SURE THEY ARE CLEAN AND TIGHT.IF BATTERY CABLES OVER 10 YEARS OLD REPLACE THEM.MAKE SURE YOU ARE USING RIGHT VISCOSITY MOTOR OIL.YOU SHOULD BE USING 5W - 30 ENGINE OIL IN COLDER CLIMATES.IF YOUR OIL TOO THICK IT WILL CAUSE ENGINE DRAG WHEN CRANKING IN COLD WEATHER.

Easy way is to disconect your battery, then reconect after ten mins, this wil then force the radio to ask for the code again, re enter the corect code and bobs your uncle!

with a new starter, this sounds like a bad battery cable or terminal end. the easier way to figure this out w/out checking the voltage drop across a whole battery cable is to affix the jumper cables strategically to find the bad one. Put jumper (+) on batt (+) and jumper (-) directly onto a piece of unpainted engine metal and not in the way of moving parts. If it starts this way then you've got a bad ground cable. If it didn't start, put jumper (+) on the hot post of the starter solenoid (there are 2 posts, only touch the one w/ the fatter cable going to it) or on a remote jump point if equipped, and put jumper (-) to batt (-). If it now starts you need a positive battery cable, or just a battery-to-starter cable (if separate)

sounds like faild starter solenoid contacts,also check for corrosion at starter and pos cable.

did u have the alternator tested to see output get a jump if the car starts takeit to a auto zone have him test the battery and alternator for free

When you put the new starter in, you didn't put one of the cables back on the post. It probably grounded itself enough to start and run, then moved by vibration, or a pothole, or gravity, and killed the motor. As for the arcing battery.... are you sure you didn't attach the jumper cables to the wrong posts?  

Check the B+ cable. If you remove the fuse box cover in the engine compartment (on the drivers side), and you'll see a post with a nut on it, securing a group of red wires. The connector should be a clean copper color. If you take it to a shop, have them perform a voltage drop test on the cable. If it is corroded or burnt, replace that cable!

Bret
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