Question about Impala 9C1 HLF

kadetklapp

Member
May 21, 2010
1,568
Indiana
I removed a Federal Signal "Ground side switching" HLF from our in-service 2002 9C1. It was not connected to anything on the car, just screwed to the radiator support. I'd like to get this working. Not sure why it was not hooked up. From what I can see, the factory headlight harness has not been cut.


FA5C-RDG Ground Side Switching Flasher "2112"


Not sure which of those is the model #. The unit has three relays, and a ton of wires. Two orange (one for each headlight I assume), red (power), black (ground), and I have green, blue, yellow and white. Without delving into a huge schematic, I'm hoping someone can point me in the right direction on what needs hooked up on a 9C1 Impala. I know that they should have used a tie-in point (in the trunk?) but it appears that they did this the old fashioned way. I also need to know which headlight wires to snip and splice.
 

unlisted

Lifetime VIP Donor
May 20, 2010
7,333
NA
Well, if it has not been hooked up, why not move it to the trunk now, if there is a hook up point in there to access?


http://www.fedsig.com/products/docs/install/2561602.pdf


heh, I can now see why you asked:

See figure 1 and perform the following
procedure:



1. Connect the flasher’s green wire to the



negative post of the battery.



CAUTION



Connection to a fusible link or a circuit



breaker may damage the flasher. Connect



only to a fuse as described.



2. Connect the white wire, through a usersupplied



10-ampere fuse to the positive post of the



battery or other high current source.



NOTE



Do not connect the white and red wires



together. The white wire must receive a



constant source of power at all times.



3. Connect the red wire to a user-supplied



single-pole, single-throw switch. Connect the other



side of the switch to a 12VDC source. This switch will



only require 1/4-ampere to activate the flasher.



4. On the PASSENGER side of the vehicle,



locate the ground wire of the high beam lamp (DO



NOT USE THE HOT WIRE.). Come out about 10" -



12" from headlamp and cut this wire in half. Connect



the yellow wire to the head lamp and the blue wire



to the other half (the return).



5. (Optional) This unit has automatic nighttime



cutoff. If you desire to use this feature, simply



“T” tap the black wire into the vehicle’s marker light



wire. If you don’t desire this feature, connect black



to ground.



6. Find the DRL input or output wire. Cut



this wire in half. Connect one of the orange flasher



wires to one of the cut DRL wire halves. Connect the



other orange flasher wire to the other cut DRL wire



half.



C. Chevrolet Impala Wiring (2000 and newer).


Follow the appropriate instructions in the



included Impala Flasher Instructions.
 

cajunblitz

Member
May 20, 2010
1,217
Saint Martin Parish LA
kadetklapp said:
I removed a Federal Signal "Ground side switching" HLF from our in-service 2002 9C1. It was not connected to anything on the car, just screwed to the radiator support. I'd like to get this working. Not sure why it was not hooked up. From what I can see, the factory headlight harness has not been cut.

FA5C-RDG Ground Side Switching Flasher "2112"


Not sure which of those is the model #. The unit has three relays, and a ton of wires. Two orange (one for each headlight I assume), red (power), black (ground), and I have green, blue, yellow and white. Without delving into a huge schematic, I'm hoping someone can point me in the right direction on what needs hooked up on a 9C1 Impala. I know that they should have used a tie-in point (in the trunk?) but it appears that they did this the old fashioned way. I also need to know which headlight wires to snip and splice.

Police package 2002 Impalas have a plug and play harness plug that would allow the interfacing of a flasher without cutting the wires. The plugs (tie in point) are triangular in shape and IIRC are white in color and are tied up somewhere close the where you found the flasher. We had many issues with the flashers failing on these cars after a few months of operation.....and I'm guessing it was due to the "relay switched ground side" design instead of a solid state version. We usually wound up replacing them or disabling them altogether and just plugging the harness back into itself.


We used SoundOff flashers that simply plugged in between the 2 factory plugs....no other wires were hooked up or run anywhere. The flasher was triggered by a factory provided wire in the harness in the car. Whoever installed your flasher may have decided it was too much trouble to cut the harness and figure out where everything goes. The directions provided by unlisted appear to be correct if you want to splice it in.
 

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