Originally Posted by anuraagshenoy
Hello Sir, I am looking at doing the same for my friends WagonR LXi (2004 model) and Alto LXi (2009 model) 800cc one.
I am planning to go the male-female connector route so can I know how to connect them properly?
I have gone through your earlier posts where you have put the pictures but it went over my head. Any simpler solution please?
Hai welcome to TAI
Its not that much complicated as you need to connect the tacho meter -ve and +ve to the Acc or battery source to any +ve connector and simple ground the -ve to body of the car chassis any where.
two important connection is tacho signal which you can take from PSW module all maruti car are having the similar module so pin 12(Brown) is the tacho signal wire for sure.
As the backlight signal tiggered via -ve volt you need a relay to correct it.
Buy a normal 12v relay 15 to 20 rs one.
Connect the +ve and -ve to the any interior lighting point.Concept is if you on the interior light relay is on and back light also on else in off position that's it.
Hope you get my point!!!!