Just purchased a 1991 accord ex manual trans and ac. when you start the car with the key in run position the tail lights and headlight go on and stay on. this happens even when the headlight switch in the off position. i changed the headlight switch thinging that this was the most possable cause. this worked one but it went back to the same problem. I changed the ignition lock cylinder and ignition switch thinking that there might a hangup there..no luck same problem.
diconnnected the turn signal and headlight swiches from ignition swich and the same problem. headlight and taillights still burn even when no juice at the swich..where to go from here--
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engine running or not,,??????
or dead charging system.
rusty battery terminals.
check battery voltage parked key in pocket, see 12.65vdc.
if lower , on a warm day the battery is discharged
or at 30F it must be.12.58vdc, rested, if not the battery is discharged
or battery is bad.
if discharged , then charge it.
and fix the bad charging system.
ok you jump start car.
and the battery voltage is 13.3 to 15vdc, if not the charge system is failing, or engine RPM below 800.
if running voltage is below 13.3v the charge system is failing running.
You may have a cracked head, block or blown head gasket that is leaking combustion gas into the cooling system. If you dont have a combution leak detector kit you can take it to a trusted mechanic tell them the problems you've had and the parts you've replaced. Ask them to check for a combustion leak in the cooling system. A minor combustion leak in the cooling system can sometimes mimic the symptoms of overheating.
Hi, I think it is your main relay. It is a major problem when the car get really hot inside. One very hot day last july my 1991 accord wagon would not start. Left it sit till the next moring(cooler temp). It started right up. Check out rockauto.com. They have the cheapest $ on new main relays. sd