reply to post by praxis
its not that hard , double pole double throw relays have 8 pins,
six at one end and two at the other
the two are for the coils .
when the coil is powered .. you hear a click sound as the contacts close .
one coil wire connects to ground (-) on all the coils
the other 6 pins of each DPDT relay are the switch part of the relay
with a felt pen write '1' , '2' ,'3' ,'4'. and '5' on the relays
1 , 3 , 5 are the SPST relays
they will have 3 pins on one end , 2 pins on the other...
the two will be the coil
one coil wire connects to the ground (-) on all the coils
the other 3 pins of the SPST relay are the switch part of the relay
run a positive wire (+) to all the " C " pins of the switchs
on both the SPST and DPDT
... at this point you have battery (+) going to the switch common's ..... and battery ground (-) going to one pin of all
the coils in the relays...
the rest is a matter of looking at what is happening
relay 1 is on which turns off relay 2 which turns on relay 3 which turns off relay 4 which turns on relay five which turns off
relay 1... which turns on relay 2... which turns off relay 3...
its a frustrated curcuit ... it can never find a static state .... so every 30th of a second its clicking away in a cycle
that never ends ....
what is important...
relay 2 and 4 ... your DPDT relays follow the pattern 00 , 10 , 11 , 01 , 00 , 10 , 11 ...
run a extreemly large ground wire to the center post of the automative coil ... and the (NC) pin of relay 2 to one post
of the automotive coil .
and the (NC) pin of relay 4 to one post of the other automotive coil .
run a wire from relay 1 (nc) to the other coil pin on relay 2
run a wire from relay 2 (nc) to the other coil pin on relay 3
run a wire from relay 3 (nc) to the other coil pin on relay 4
run a wire from relay 4 (nc) to the other coil pin on relay 5
run a wire from relay 5 (nc) to the other coil pin on relay 1
pls note... (C) = the common of a switch
(NC) = normaly closed
(NO) = normaly open or a powered closed curcuit
the coil does not care which is ground or positive... it will funtion with out regard to polarity....
when the curcuit is broken to the automotive coil... a spark will occure between the center post and the oppisite post...
be warned... it will be of very high voltage , and quite a nasty little spark... 1/2 inch or more... so you might want to
handle it with a weeee bit of care...