viper 791xv 98 trans am

Did not find a 1057 document on Directechs, but 1052 is for Camaro/Firebird door locks.

You have an open trace on the lock side of the door lock relays inside the BCM. Repair the burnt circuit board trace, and you will be OK. Gus Wherever I go, that is where I end up......

What's the best way to bypass the VATS (vehicle anti theft system) in a 1998 pontiac trans am.  I see kits on ebay for like $25.  Does DEI offer a part that easily interfaces with a Viper 791XV alarm, i 'd like to have quality/dependability?  I plan to swap a used BCM for mine which seems to have a fried circuit and need to get it to work with my key. 

resistor and a relay... fast and effectiveKevin Gerry

Certified Electronics Technician

MECP First Class Installer

Owner/Installer

Classic Car Audio

since 1979

Anyone know what I need to do here?

If you have changed the BCM, you will have to get the dealer to reprogram it for your car and VATS system. The BCM reads the value of the resistor in your key when you place it in the ignition cylinder. The resitance value of the key is stored in the BCM. If the value of the key matches the stored value the BCM will enable the fuel and starter circuits. If you bypass the current system, it won't help after you replace the BCM. You need to use a ohm meter to measure the resistor in the key. Cut the two white wires, usually insulated inside orange or black insulation and install a resistor of the same value as the key across the two cut sides of the wires going into the car and not the key cylinder. This way the car will see the correct value all the time.sparky

Does anyone know where and which wire is the hood pinswitch wire in a '98 firebird?  I've looked around the wiring guides and haven't ever seen this one.  Basically I have a Viper 791xv with everything hooked up except the remote starter, and I want to hook it up.  Shouldn't be too tought to find all the rest of the correct wires, but if anyone has suggestions or knows exactly which wires go to what and can provide this help, that would be awesome!

Wire/Function	Colour	Location/Description	Polarity
PASSIVE ANTI-THEFT	YES	PASSKEY / V.A.T.S.	SEE NOTES
12 VOLTS	Red	Ignition harness	+
IGNITION	Pink	Ignition harness	+
ACCESSORY	Orange	Ignition harness	+
STARTER	Yellow	Ignition harness	+
KEY SENSE	Lt.green	Ignition harness	-
TACH SIGNAL	SEE NOTES
WHITE at the Ignition module on the top of the engine for the 3.8L. The 5.7L engine has a coil per cylinder. The WHITE tach wire can be found at the PCM behind the right strut tower at pin-35 of the 80 pin connector.
LOCK	RED / black	Driver's kick panel	-
The BCM which control the doorlocks goes into a sleep mode when the vehicle is left sitting for a few minutes and the doorlocks no longer operate. The module must be 'woken up' before the doorlocks can be operated again. See the ALARM diagram for details. PLEASE NOTE: On models equipped with no factory security, the doorlocks can be wired as a reverse polarity doorlock system.
UNLOCK	ORANGE / black	Driver's kick panel	-
The BCM which control the doorlocks goes into a sleep mode when the vehicle is left sitting for a few minutes and the doorlocks no longer operate. The module must be 'woken up' before the doorlocks can be operated again. See the ALARM diagram for details. PLEASE NOTE: On models equipped with no factory security, the doorlocks can be wired as a reverse polarity doorlock system.
DOORPIN	Gray/black & BLACK/ white	At BCM above pass. Kick	-
Both wires should be isolated with 1N4001 diodes to prevent any feedback. You can also find your hatch trigger and doorlock wires here as well as the hatch release wire.
TRUNK PIN	ORANGE / black	In driver's kickpanel	-
TRUNK RELEASE	BLACK/ white	In driver's kickpanel	-
DRIVER DOOR LATCH	Gray/black	Same as doorpin	-
FACTORY DISARM	See notes
BRAKESWITCH	White or Lt.blue	At switch above brake pedal	+
PARKLIGHTS	Brown	In driver's kickpanel	+
HAND BRAKE	Tan/white	At steering column harness	-
HORN	Black	At steering column harness	-
CLUTCH SWITCH	Dk.green	At switch on top of clutch pedal	TYPE 1
DRIVER WINDOW UP	Dk.blue	At switch in driver's door	REV POL
DRIVER WINDOW DOWN	Brown	At switch in driver's door	REV POL
PASSENGER WINDOW UP	Blue or Blue/white	At switch in driver's door	REV POL
PASSENGER WINDOW DOWN	Tan	At switch in driver's door	REV POL
HEADLIGHTS	Yellow	At light switch harness	+
REVERSE LIGHTS	Lt.green or Gray	In driver's kickpanel	+
DIMMER	Gray	At dimmer switch harness
VSS WIRE	Dk.GREEN / WHITE	Behind radio or at PCM	4000ppm
This wire can be found on the connector to the rear of the vehicle's radio or at the PCM behind the right strut tower pin-55 of the 80-pin connector.
DATABUS INTERFACE	Pin-2(top row from left)	Diagnostic plug below dash	DATA
V.A.T.S.	White	In orange tube at steering column	DATA

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