Testing a starter relay is quite easy.
basic equipment needed is 12v battery with 2 x wire i use crocodile clips .
you can also use a small test bulb as well .
if you need to buy a new relay then try here on Ebay UK
or you can invest in good and safer tool like the 12v powerprobe and
snap of test light probe I bought and are excellent .
I always have a fully charged 12cv battery with crocodiles knocking
about it saves loads of hassle
The relay , the small terminals are what connect to your starter
button and carry a lot less current .the larger terminals
are connected direct from battery to the starter
motor so need larger wires to carry the
massive starting currents .
I am using the power probe here as its safer but you can just as
easily connect the 12v negative to one side and tap
the positive on the other side you should hear a
click as you touch the positive and remove it .
You can go a step further and add a test light to it and confirm
current it going through the secondary circuit .
to test with a lamp you need to connect one end on test light circuit
to battery positive and the to one of the relays larger terminals
and then use another cable from second larger terminal to negative of
battery ill do basic circuit diagrams at bottom of page .
Now when you put power to the smaller terminals it should click but
also the light should flash on and off as you tap power .
OK not the best , never have been very good with Windows Paint
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