CORPORATE OFFICE
Truck-Lite Co., Inc.
310 East Elmwood Avenue
Falconer, NY 14733
Phone: 716-665-6214
Fax: 716-665-6403
Web: www.truck-lite.com
A QS9000/ISO9001 Company
Signal-Stat 900 Series Trouble Shooting Guide
1. If nothing is working, please check for the following:
• Make sure there is a really good ground to the steering column (metal to metal) or run
separate ground wire under anchor clip to chassis
• Re-check the wire colors / locations
• Check for shorts where wires are spliced
• Use a (3) terminal flasher; “P” = Pilot (Blue), “L” = Load (Yellow), “X” = Power from
battery
2. The pilot light not working is usually a good indication of insufficient ground, the flasher is bad
or the bulb could have burned out.
3. The pilot light is staying on usually means the Blue and Yellow wires are connected together on
a two terminal flasher, (see note 8).
4. The hazard lights flash but the turn signals don’t. Make sure there is a really good ground
(metal to metal) contact between the strap and steering column. The quality of 6V flashers is
poor. They have small parts that break during shipping. Some customers have to try 2 or 3 of
them before they find a good flasher, (see note 1).
5. Positive ground vehicles do not affect the switch, installation is the same.
6. If customer has separate hazard and turn signal flashers, 2 possible methods:
Method 1 - try hooking up a jumper wire between the 2 flasher power terminals. This terminal is
usually marked with "L" adjacent to the terminal. You would also run the YELLOW wire from
the turn signal switch to one of the 2 "L" terminals. This is the power for the switch. With this
method, you will continue to use BOTH flashers. If you want the green and red indicator lights
on the turn signal switch to work, you would also have to run the BLUE wire from the switch to
the "P" terminal of BOTH flashers.
Method 2 - is to run the wires from your hood indicators from the hazard flasher to the "P"
terminal of the turn signal flasher. With this method, you will only use ONE flasher to do both
functions. Again, if you want the green and red indicator lights on the turn signal switch to work,
you would also have to run the BLUE wire from the switch to the "P" terminal of the flasher.
7. If customer has a Painless Wiring Harness with separate turn and hazard flashers:
• Disconnect the Painless Flasher
• Add a jumper wire between the two slots
• Install a 263 (3) terminal flasher; P = Blue for Pilot or indicator light, L = Yellow for
load, X = Purple, wire # 952 from harness for Power