Install A Whelen Hhs2100

The Whelen HHS2100 is a hand-held siren and light control system. It uses a hand-held radio to transmit audio signals through an amp/relay module leading to a siren, and is also capable of controlling the power to a series of lights. You can install a Whelen HHS2100 if you have wiring and automotive knowledge.


1. Find a location for the amp/relay module. The location should be a cool, dry area on the vehicle chassis and have proper ventilation to keep the module cool during use. Place the module inside and mark the surface where the holes are to be drilled.

2. Set aside the module and prepare a drill with a #10 sheet metal screw drill bit. Drill the holes. Screw the module into place using #10 x 3/4 sheet metal screws and #10 internal tooth lock washers.

3. Find the Molex connector and wires. Plug the 1-1 black wire from the amp/relay to the negative battery terminal. Connect the 1-2, 1-3 and 1-4 red wires between the amp/relay and the positive battery terminal. The 1-2 requires a 20 Amp fuse. The 1-3 and 1-4 wires require 40 Amp fuses.

4. Connect the 5-1 wire between the amp/relay and the ORG speaker wire on the siren. Connect the 5-2 wire between the amp/relay and the BRN speaker wire on the siren.

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