Impulse Tachometer Wiring Diagram

8 pin connection f1 fuse 5a quick response c1 8 pin mqs connector you must comply with the.

Impulse tachometer wiring diagram. A switched 12 or 24 volt wire can be found coming from the ignition switch. This gives two distinct advantages. Two pairs of connections were required one pair for the supply leads and the other for the pulse pick up leads. Connect the wire from pin 4 to a switched 12 volt or 24 volt source.

Refer to diagram d. Follow this wire to a junction and attach the wire from pin 4 at this junction i e. The tach is a current sensing type signified by the i in smith s part number rvi 3410 00. Connect the wire from pin 4 to a switched 12 volt or 24 volt source.

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. There is no galvanic connection between input ignition of vehicle and internal circuit of tach. Magnetic circuit that allows the tachometer to sense pulses. Input primary of t1 consists of an inductive link also.

Connect a wire from pin 5 to a constant 12 or 24 volt source. This is a good example of the impulse tachometer. Refer to diagram d. Follow this wire to a junction and attach the wire from pin 4 at this junction i e.

The plastic former shown in the diagram holds the pulse lead in place and prevents the wire chafing against the case and shorting out. 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.