ThunderMax Conductivity - How To Improve and Maintain - Manual

Improving Conductivity of Your Electrical System
Version 01-24-2013
The Product Support Team has identified poor conductivity as the most common source of problems that might
falsely lead the user to believe there could be a problem with their ThunderMax® EFI system.
Interruption of 12v power to the EFI module causes some unusual problems with the engine management
system, gauges or other electrical functions on the motorcycle.
Occasionally we hear reports of situations where performance has changed or diminished, or momentary
gauge loss has occurred. These issues are abnormal and should be corrected.
If you ever incur gauge loss, simply cycling the main power may restore the gauge functionality
With the guidance of this tech document, it is likely you will find the correct process needed to address the root
cause of the conductivity problem. This should be performed at your earliest convenience.
1. Read DTC
’s
Harley Diagnostic Codes and How To Access Them
There may be stored Diagnostic Trouble Codes (DTC) in the module which could provide you with
insight to specifically what is wrong with the motorcycles 12v power source.
Record any DTC ’s prior to clearing.
If no DT
C’s are present, move on to checking for Corrosion or Oxidation on electrical components
and connections.
2. Check For Corrosion and Oxidation
Corrosion/Oxidation is the #1 enemy of your motorcycle ’s electrical system and power source
connections.
Corrosion/Oxidation can cause a faulty or inconsistent ground which can lead to number of problems,
one of which being voltage spikes or surges that can cause VERY harmful effects to your motorcycle.
Corrosion is routinely found in the field and will also cause problems related to insufficient or
interrupted voltage that can affect the performance of your motorcycle.
It can be found on battery cables, electrical connectors, fuse connections, relays or completely hidden
within the ECM connector and other connectors.