Cagiva Mito Starter motor solenoid relay testing

Cagiva mito 125 for sale here on Ebay UK

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Testing the solenoid , this one i tested has corrosion on the secondary contact plates so was unable to test fully .

ill update asap .


its quite and easy test .

First test the primary coil with a multimeter set to continuity / ohms and listen for buzzer to
confirm coil wire is intact .

if it buzzes it signals a good coil so solenoid should switch at least , if not you have a damaged coil so you need to replace solenoid.

If it beeps you can then test the secondary side of solenoid and that the coil is actually switching and moving the contact plates .

Testing the secondary side of the solenoid , can be done by putting 12v to the primary terminals
you should hear a click , this tells you the contact plate is moving under the magnetic effect of the
energized primary coil .


 you need a 12 volt power source , battery.

I use a power probe they are cheap and make power testing safer  ( buy powerprobe here )

Power probe 12v 

you then have to connect the negative clip and positive tip of power-probe to primary 12v terminals
to energize the coil.

you should here it click , at the same time you should connect you multimeter set to continuity across the main large terminals.

the energized coil should move contact plate the connect the two large terminals together creating
a circuit  and continuity , hard to explain but easy if follow below drawing.

or instead of using a multimeter you can use a test lamp , when you 

energize coil the bulb should light to confirm complete circuit.

Possible problems 

if the primary test fails ie ,  no continuity it means primary coil is damaged is faulty so solenoid needs replacing .

if secondary test fails to click it could mean contact plate mechanism  is seized and

will not move to make electrical contact , sometime throwing solenoid to the floor or tapping with 

hammer will free it .

if it clicks bit test light or multimeter fails to light or signal continuity then the solenoid

contact plate , contacts are probably worn , pitted or rusted , sometime tapping or banging can 

clean off the contacts but not often and a new solenoid is needed .

Buy solenoid from Ebay UK here 

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