AEM 30-3020M Water Methanol Failsafe Device - Manual (Page 3)

Page 3
The Water/Methanol Failsafe also has an auxiliary input that can be used to trigger an alarm condition. Users with the
AEM Water/Methanol Injection System (PN 30-3000 & 30-3001) can use the “Boost Safe” ground output to trigger the
auxiliary input if any of the internal fault conditions are detected by the AEM progressive controller.
NOTE: It is HIGHLY recommended that the Water/Methanol Failsafe be used in conjunction with the AEM
Water/Methanol Injection Filter (AEM part# 30-3003). Using a filter will maximize the performance and longevity
of your flow sensor as well as your entire injection system.
INSTALLATION
1. Disconnect the negative battery cable.
2. Temporarily install gauge without bracket into desired mounting location. Gauge mounts into a 2 1/16” (52MM) hole.
The supplied rubber band can be used as a spacer around the gauge if it fits loosely in mounting hole.
3. Splice into injection line and install flow sensor as close as practically possible to final injection point. Flow sensor can
be installed before or after check valves or flow control solenoids. A filter is highly recommended and should be
installed ahead of the sensor. Ensure arrow on flow sensor points in the direction of flow. Avoid exposing flow sensor
to high heat sources (exhaust, turbo, etc.). Route flow sensor cable to gauge mounting location.
4. Install USB cable so the PC end of the cable is easily accessible and route the gauge end of cable to the gauge
mounting location. USB cable is meant to be permanently installed to gauge and left in vehicle. Stow PC end of
cable in location such as glove box or center console, etc.
5. Install the 4 & 8 pin harnesses and connect wires as described below:
8 Pin Power Harness
Color Label Description
Red PWR Constant power; connect to a fused constant +12V power source
Black GND Ground; connect to good chassis ground or directly to battery negative ( −) terminal
Pink IGN PWR Ignition power; connect to a fused key on +12V power source
Grey LIGHT Gauge backlighting; connect to instrument lighting dimmer wire
White ANALOG + *OPTIONAL* 0-5V analog output for flow; connect white wire to + analog input and brown
wire to
− analog input of data logger or EMS; see note below Brown ANALOG −
4 Pin Input & Output Harness
Color Label Description
Yellow HI SIDE +12V output; connect to an external auxiliary device (1.5A max current)
Blue LOW SIDE Ground output; connect to an external auxiliary device (1.5A max current)
Green AUX
*OPTIONAL* Auxiliary alarm input; if using AEM Water/Methanol Injection System, connect
to the green wire of progressive controller (Boost Safe output); other injection systems may
connect to optional ground switch (fluid level, etc.) input
Orange INJ PER
Injection percentage input; if using AEM Water/Methanol Injection System, tap orange wire
of progressive controller; all others tap wire that connects from progressive controller to
pump
6. NOTE: The analog output is a differential output so the brown wire should be connected to an analog ground input for
best results. If the EMS, logger or similar device does not have an analog ground input, the brown wire should be
connected to a sensor ground. If no sensor ground is available, the brown wire should be connected to a power
ground. The brown wire must be connected in order to obtain correct flow readings from the analog output.
7. Connect all cables and wiring harnesses to gauge. Fully install gauge into hole using mounting bracket and nuts.
PC SOFTWARE
Download and install the Water/Methanol Failsafe configuration software from the AEM Performance Electronics forum at
http://forum.aempower.com/forum/. Open the configuration software and connect the USB cable to the PC. If permanent
power is present the Water/Methanol Failsafe will turn on with ignition key-on power. Alternatively, the Water/Methanol
Failsafe can be bench-programmed outside of the vehicle without powering it by connecting just the USB cable, however,
the backlighting, needle and warning lights will not activate.