Can anyone please tell me where to hook up the tac wire for the viper 550 esp remote start and car alarm. I am installing it in a 1999 chevy silverado I cant find where the manual is talking about. I am stuck and any help will be appreciated. Thank you .
Nick
In 99, chevy made both the old body style, and the new body style trucks. Which do you have?
Heres what I found.
tach signal---white----at ignition coil or PCM
"Ignition coil is located on passenger rear of engine. Some trucks will be equipped with a multi coil ignition system similar to the Corvette. Tach wire may be located at each coil or at the PCM-Left front of engine compartment"
So if your truck is the newer body style, it uses the multi coil setup, if its the old style, the ign coil is on the passnger rear on the engine. Test the suspected tach wire with a digital multimeter. Set the meter to ac voltage, and groung the negative wire. Probe the suspected tach wire with the positive probe while the engine is running. Look at yer reading on the meter and have an assistant press the accelerator pedal to rev up the engine, you will see the reading increase with engine rpm's if you have the correct wire.
It is a white wie located near the battery, down low, between the fender and the fan under the black plastic cover. On the 4.3L, the tach wire is at pin 20 in the connector labeled 'red', and VSS wire is at pin 3 in the connector labeled 'black'. On the 4.8L, 5.3L, and 6.0L, the tach wire is located at pin 10 in the 'red' connector, and VSS wire is located in pin 50 of the 'red' connector.
There are a few white wires down there so be sure to test until you find the right one. Also make sure that you bypassed the passlock or it will not start with alarm.