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Theft Deterrent Relay

This category on the website [ Relays and Wiring ] we are giving you all of the information related to the individual relays in the Buick Turbo Regal, along with the associated wiring, connector plugs, etc.

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VEHICLE APPLICATION:
Buick Regal, T-Type, Turbo T, Limited, Grand National, GNX

RELAY NAME:

Theft Deterrent Relay

(some sellers use some form of these terms since they aren’t sure what to call it: Anti-Theft Deterrent Alarm Ignition Module Relay)
– HOWEVER, this relay DOES NOT control the ignition/starter portion, that relay is called: “starter interrupt relay”

PURPOSE OF RELAY:

controls horn & lights as part of the anti-theft deterrent system

TURNS ON-OFF / FUNCTIONS / USED WHEN:

when the theft deterrent controller is triggered, it turns this relay on (which in turn controls the horn & lights)

LOCATION IN VEHICLE:

behind dash, left side of steering column

ORIGINAL GM PART NUMBER:

1620783 (for most Turbo Regals) – (This relay has 6 connector pins)
[details/specs stated below are for THIS relay]

1616422 (assorted 1981-1985 Buick Regals) – (This relay has 4 connector pins)

RELAY / BASE COLOR:

black, or white, or yellow (depends on vehicle year)

CONNECTOR PLUG COLOR (RELAY SIDE):

white

WIRES ATTACHED (RELAY SIDE):

n/a

CONNECTOR PLUG COLOR (HARNESS SIDE):

black

NUMBER OF WIRES ATTACHED (HARNESS SIDE):

8 (on 6 terminals)

COLOR & PURPOSE OF (HARNESS SIDE) WIRES:

[2 wires on 1 terminal]
red-white “A” (1 of 2 wires), goes to theft deterrent controller “A”
red-white “A” (1 of 2 wires), goes to in line fuse “A” (25 amp; hot at all times)

[2 wires on 1 terminal]
dark green “B” (1 of 2 wires), goes to horn
dark green “B” (1 of 2 wires), goes to horn

brown “C”, goes to rear lights (marker/park/tail/license)

red-white “D”, goes to in line fuse “B” (25 amp; hot at all times)

tan “E”, goes to headlights

black-white “F”, goes to theft deterrent controller “F”

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OTHER NOTES:

[SEE theft deterrent controller module]
[SEE theft deterrent relay]
[SEE theft warning system switch]
[SEE starter interrupt relay]

[SEE Security dash light]

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PHOTOS OF RELAY AND CONNECTED WIRES:
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The relay shown below (3 pics) fits the following Buick Regal models, which IS DIFFERENT from the version shown above (this one has a different part number)! This relay has 4 connector pins.

Buick 1981 Century, Regal (A), Buick 1982 – 1986 Century, Regal (A), Buick 1983 Riviera (E), Buick 1984 Regal (G), Buick 1987 Regal (G) with 231A, 307Y, 3.8-7, Buick 1987 Regal (G) 305H Export, Canada.

1985 buick regal Anti Theft Deter Alarm Relay 1616422
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Here’s a list of all of the relays in the Buick Regal:
(click the links to go to the one you need info about)

* Air Conditioning Compressor Cutout Relay (A/C Cut-out)
* Blower Relay (hvac fan blower motor)
* Coolant Fan Delay Relay
* Door Lock Relay
* Fuel Injector Relay (aftermarket)
* Fuel Pump Relay (factory)
* Fuel Pump Hot Wire Relay (aftermarket)
* High Speed Coolant Fan Relay
* Horn Relay
* Ignition Module Relay (aftermarket, hot wire kit for coil pack)
* Low Speed Coolant Fan Relay
* Power Antenna Relay
* Power Master Brake Relay
* Starter Interrupt Relay (part of Theft Deterrent system)
* Theft Deterrent Relay
* Twilight Sentinel Module Switch Relay

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