Solenoid resistance
 

The new rebuilt starter doesn't work. I have 12 volts in all the right places at the right times. I measured 90 ohms across the solenoid terminal and from the solenoid terminal to ground. This seems high. I would result in only .13 amps to pull the solenoid in. Before I pull the starter again, I would like to be sure this is the issue. Does any one know the resistance?

Thanks,

Arnie

Resistance figures aren't usually specified in auto electrics.

Pull the starter and bench test it. Sounds like a bad solenoid. You can check the motor directly by connecting a booster cable to the starter terminal.

Sherwood

Does anyone have one off there car to measure this resistance. As is not a 10 minute job to pull the starter in a 911 for a benchtest. Or is there an easier way of getting the starter out, rather than dropping the front of the trans 6"?

Thanks,

Arnie

Re: Solenoid resistance
 

I'm with Sherwood on this one. I've never read sol coil resistance listed anywhere.

It either works or it doesn't. If it doesn't click then you work from there.

I'm not familiar with the Carrera starter add-ons so the first thing I might do is get a 10ga jumper wire connected to the sol yellow wire terminal. Disconnect every other starter wire including the large battery feed for safety and possible damage prevention. Get out from under the car and put 12v to the jumper wire. If it "clicks" then the sol is operational. If hearing is difficult for whatever reason then connect your ohm meter from the battery wire connection on the sol to the other large sol lug that's connected to the starter motor. When the sol is jumped the ohm meter will show a connection between the two large sol lugs.

Maybe keep the transmission in neutral for any starter testing.

fwiw.. you probably have a weak sol feed that's not delivering the current necessary for sol operation. I use 10amps as a general necessary current for good sol operation. If so then you'll have to track and clean the sol trigger circuit connections. The most famous to cause prob's is the 14pin plug in the engine compartment.

Re: Re: Solenoid resistance
 

I am interested on this. could you please be alittle more specific about the potential problem with the 14 pion plug?

Thanks

Re: Re: Re: Solenoid resistance
 

That plug connection is probably in the most severe stressful environment on the whole car, except for the starter. The routine is to disconnect the 14pin plug, gently clean the silver terminals, slightly spread the male pins with a razor blade, and thinly coat all terminals with dielectric.

Thanks, now I have something to add to my project list.

pulling the starter works best with yoga position #17 "cradling the big lump"

reach all the way around the trans.

you probably can do it in 10 minutes - if the car is already on stands.

How's your gnd. strap BTW??

Just addressed my starter problem by installing an auxillary solinoid made for a 91 Ford Aerostar. Mounted the unit on the back seat area ( external bottom of car just across from the starter) with self tapping screws that serve to ground the unit, and then I believe the idea is to connect that in series with the solenoid on the starter. If you guys are interested maybe I can post a picture. I was having a problem starting the car when the engine was hot. Turn the key and nothing, not even a click. A guy named Larry Colins at C and R Porsche in Gardenia Ca. showed me what to do. Nice guy, he didn't even charge me for the info.

I did that somewhat in the engine comp. What my system needs is a direct ign sw to starter sol 8ga AWG yellow wire.