97 caravan Evap Purge Solenoid problem.

Hello,

The purge solenoid is not functioning. I removed the solenoid and
connect to a 12v supply and it seems to work fine.
With it in the van and the engine running for at least 10 minutes I measure
12V on the Wht/Blk lead and 10 ohms on the Pink/Blk lead. With the engine
off I still measure 10 ohms on the Pink/Blk lead, which runs to the computer
and from what I've read is supposed to be cycled. Why is it still measuring
10 Ohms with the engine off? Shouldn't it be an open circuit with the engine
off?
I played with the wiring harness while measuring 10 ohms and the engine
off and this measurement did not change. When I disconnected the main cables
from the computer it went to an open circuit. Is the short in the
computer????

Does 10 Ohms sound right in any situation?

Or do I have a problem with the computer?

Thanks for any input.

Rick Keener

 

if you are getting 10ohms from the pcmend and that wire end at the solinoid then
you are 5 ohms over spec and have a wire issue and a voltage drop test should be
done on that wire

 

OK I wasn't clear how I made the measurement. I have an analog meter,
the negative probe was on a good chassis ground and the positive probe on
the Pink/Blk wire at the Evap Solenoid connector. So, the circuit was
through the chassis then the computer, then the wire to the connector. This
is how I was measuring the 10 ohms. I and was getting this 10 ohms whether
the engine was turned on and running for 10 minutes or off. It seems like
with the engine off I should get an open circuit..... Shouldn't I get an
open circuit????

Rick