My 05 chevy express starts with no key in ignition as soon as I hook up battery.

SOURCE: tried jumpering a dead battery with a battery

check that you do not have signal to s terminal on the starter, disconnect it and try hooking battery if starter turns there is an internal short in the starter,

SOURCE: 1988 460 motorhome starting problem

When its hooked up, you should be able to put 12 volts on the little stud on the solenoid and it should start. One large stud will have 12 volts on it, so just jump it right there. Did you get the wires in the right place. The solenoid should have 1 large wire going down to the starter. Be sure the battery cables are clean and tight ( both ends) Check battery voltage when cranking, should go to 10-11 volts. Check voltage between negative terminal on battery and engine, should be ZERO when cranking. The solenoid has 2 large studs, make sure the battery positive wire and all the other wires are hooked to this stud, the other large stud should just have the wire going to the starter.

SOURCE: having starter problems,try boosting,check battery

you better check your starter motor (relay and/or fuse)

tomcattech17

• 215 Answers
• Posted on Jun 17, 2011

SOURCE: 1997 Lexus SC300. 113,000 miles.

You most likely have a short in the wiring to the starter.

Last time I saw something like that a vehicle's exhaust headers created heat which eventually melted the wire's insulation and several of the wires were exposed and shorting on each other and the ground of the vehicle. If possible, get the car on a lift and inspect your starters wiring....

Hope this helps...

Stephen

• 21873 Answers
• Posted on Apr 09, 2013

SOURCE: 05 Chevy Cobalt Key won't engage starter, new ignition switch, can jump the brown wire in the column and then turn the key to start?? When you turn the key on everything comes on like it's sup

Glad you solved it.