Viper 4103XV Installation Guide download pdf (Page 26)

Programming jumpers

4103XV

➢Light ﬂash (+)/(-)

This jumper is used to determine the light ﬂash output polarity. In the (+)

position, the on-board relay is enabled and the unit will output (+)12V

on the WHITE wire, H1/9. In the (-) position, the on-board relay is dis-

abled. The WHITE wire, H1/9, will supply a 200mA (-) output suitable

for driving factory parking light relays.

Note:

For parking light circuits that draw 10 amps or more, the internal

jumper must be switched to a (-) light ﬂash output.

P/N 8617

or a

standard automotive SPDT relay must be used on the H1/9 light ﬂash

output harness wire.

➢ Tach threshold on/off

In most cases, this jumper can be left in the OFF po si tion. Some new

vehicles use less than 12 volts in their ignition systems. The unit may

have trouble learning the tach signal in these ve hi cles. Changing the

jumper to the ON setting changes the trigger threshold of the digital

tach circuit so it will work properly with these vehicles.

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Viper 4103XV Installation Guide Page 26