STEMCO Aeris Inflation System Troubleshooting - Manual (Page 11)

Aeris System Troubleshooting
Sept 2013
Page 11 of 18
Condition: Driver Warning Lamp does not come on at all
Possible Causes: Loose, broken or corroded connection or wires, bad bulb or bad control box circuit board
Before starting this section
Verify power and ground connections supplying the trailer
Verify control box is wired correctly (see figure 3 on page 18)
CAUTION: DO NOT SHORT CONTROL BOX WIRES TOGETHER WHILE THEY ARE CONNECTED TO THE CIRCUIT
BOARD. CONTROL UNIT DAMAGE MAY RESULT
(Note: Do not use a volt meter to conduct these tests. A test light is required)
Open control box. Is light
illuminated on circuit
board (flashing or solid)?
Yes
Yes
Yes
No
No
No
Disconnect Yellow and Brown
wires from the circuit board
and short them together. Is
Driver Warning Lamp on?
Poor lamp ground, burnt
out bulb or wiring to the
front of trailer is bad,
repair as needed
Reconnect Yellow wire then
Brown wire to circuit board.
Did circuit board light come
on and flash 3 times?
Yes
Complete Power on Test
again, circuit board is
operating properly
If circuit board light does not
flash three times a bad circuit
board is indicated
(See note 1 on Page 18 before
replacing control box)
Go to Page 12
Verify repairs
by completing
Power on Test