Impulse Tachometer Wiring Diagram

A switched 12 or 24 volt wire can be found coming from the ignition switch.

Impulse tachometer wiring diagram. The pulse leads were in fact one continuous wire with a loop forming the primary winding of a transformer taken around a soft iron core projecting from the rear of the tachometer. Two pairs of connections were required one pair for the supply leads and the other for the pulse pick up leads. Refer to diagram d. Refer to diagram d.

Follow this wire to a junction and attach the wire from pin 4 at this junction i e. This gives two distinct advantages. The tach is a current sensing type signified by the i in smith s part number rvi 3410 00. Follow this wire to a junction and attach the wire from pin 4 at this junction i e.

A switched 12 or 24 volt wire can be found coming from the ignition switch. The plastic former shown in the diagram holds the pulse lead in place and prevents the wire chafing against the case and shorting out. 8 pin connection f1 fuse 5a quick response c1 8 pin mqs connector you must comply with the. This is a good example of the impulse tachometer.

If you have to make a new one the best material to use is soft iron from an old power or audio transformer but any mild steel will do. There is no galvanic connection between input ignition of vehicle and internal circuit of tach. Tachometer without display 13 gb 14 connector set 8 pin a2c59510850 30 terminal 30 steady state plus 12 v 15 terminal 15 connected ignition plus 58 terminal 58 lighting 31 terminal 31 ground designations in the wiring diagram. Connect the wire from pin 4 to a switched 12 volt or 24 volt source.

Connect a wire from pin 5 to a constant 12 or 24 volt source. Connect the wire from pin 4 to a switched 12 volt or 24 volt source.