Programming Jumpers; Tach Threshold On/Off; Light Flash (+) - Directed Electronics Python 990 Installation Manual

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The LED will light constant when the tach signal is learned.

Release the Valet/Program switch.

programming jumpers

In most cases, this jumper can be left in the OFF position. Some new vehicles use less than 12 volts in their

ignition systems. The unit may have trouble learning the tach signal in these vehicles. Changing the jumper to

the ON setting changes the trigger threshold of the digital tach circuit so it will work properly with these vehi-

cles. These vehicles include many newer Dodge/Chrysler/Plymouths, such as the Neon Cirrus/Stratus/Breeze and

LH-based cars.

This jumper is used to determine the light flash output. In the (+) position, the on-board relay is enabled and

the unit will output (+)12V on the WHITE wire, H1/11. In the (-) position, the on-board relay is disabled. The

WHITE wire, H1/2, will supply a 200 mA (-) output suitable for driving factory parking light relays.

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