2018-1047

* * CONFIDENTIAL * *
Technical Service Bulletin 2018-1047
DATE:
November 5, 2018
TO:
E-ONE Dealers
FROM:
Kevin Kearns, Customer Support Manager
SUBJECT:
Air Restriction Indicator Sensor Wiring, Revision to TSB 2018-1043 dated
October 15, 2018
Purpose or Background:
During a routine truck delivery inspection a malfunction of the air flow restriction indicator light
was detected. Our investigation determined that the malfunction was introduced in 2007 with the
launch of the new ISSPRO gauge cluster. The new dash gauge cluster changed the requirement
for air flow sensor signal from active high to active low. This malfunction went unnoticed until now
due to our published air filter routine maintenance requirements and the air filter’s longevity.
Instructions:
In order to allow the gauge cluster air restriction indicator to function correctly, the air flow sensor
located at the air filter requires a ground circuit wired from the truck battery to the air flow sensor
terminals.
At the right side truck battery ground post, connect a 16 gauge loomed black wire by using a 3/8”
insulated ring terminal (see fig 1). Run the loomed wire along side of the cab tilt pull cable from
the right side truck battery to the air flow sensor located at the right front air filter elbow. At the air
flow sensor, remove the existing “Chassis Ign” ( green wire) and seal the end of the circuit. Using
a 3/8” insulated female spade terminal (see fig 2) connect the 16 gauge black wire originating at
the batteries to the air flow sensor. Secure the loomed 16 gauge black wire to the cab tilt pull
cable with wire ties.
This will be a running change on newly built E-ONE apparatus. Estimated time to complete this
procedure is 30 minutes. The procedure will only be covered under warranty if the vehicle is within
it’s standard or purchased extended warranty period.
The inspection and correction should be performed at the next regularly scheduled maintenance
or service visit.
If you have questions concerning this bulletin, please contact the E-ONE Customer Support
Department at (352) 237-1122.
1
Fig. 1
Right Side Batteries Ground Terminal
3/8” ring terminal
Fig. 2
Air Flow Sensor
3/8 female spade terminal
2