01 f150 viper 5501 idatalink ads tb issue

New issue....The "service engine soon" light came on the next day...Any thoughts?

Possibly coincidence but...

List your H3 connections and to where did you connect the Tach wire?

Soldering is fun!

Did you connect all 3 ignitions (2 if you have all wheel ABS) AND 2 accessories at the ignition switch? Did you use relays for the additional connections? 12volts      yellow and lt. GREEN/ purple      +      ignition harness Starter      RED / lt. blue      +      ignition harness Second Starter                  Ignition dk. blue/lt. green      +      ignition harness Second Ignition gray / YELLOW      +      ignition harness Third Ignition lt. blue/pink      +      ignition harness Notes: Power this wire if vehicle is equiped with only rear anti-lock brakes. Vehicles with all wheel anti-lock brakes do not have this wire. Accessory  RED / black   +      ignition harness Second Accessory       BLACK/ green      +      ignition harnessKenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

H3 Connections: 12 Volt------lt.GREEN/ purple-------ignition Starter------RED / lt.blue-----------ignition Ignition-----dk.blue/lt.green------ignition Second Ignition-------------------Didn't use   (possibly the problem?) I have 4wheel ABS Accessory-------BLACK/ green----------ignition Second Accessory------------------Didn't use   (possibly the problem?) Note: Originally I had the H3/Accessory hooked up to the RED / Black and found that the heater fan was not coming on, I switched the accessory to the BLACK/ green...same problem, radio is active with no keys but the heater fan still won't work. Also I did not hook up the Tach wire since the 5501 has the auto detect through the unit...Should I still use the Tach wire?

@offroadzj ---- As you can see I did not hook up both Ignitions or both accessories... I also didn't use any relays.

I can almost guarantee that is your issue. Connect the pink/white flex relay to the 2nd ignition and connect the 2nd accessory through a relay as follows: Pin 85 - (-)200ma 2nd accessory output (from relay harness) Pin 86 - 12v constant fused Pin 87 - 12v constant fused Pin 30 - 2nd accessory wire in vehicle. If you have the 3rd ignition wire present you will have to connect that as well with another relay. Just change anything that says "accessory" in the above relay to "ignition" As far as the tach goes, tach is always the most reliable sensing. Will it work without it, yes, but it may not be reliable starting or may over-crank the starter. Tach is the right way to do it...Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

Re - Tach   Does it get cold there in Alaska?  See how virtual tach does, but be ready to switch over.

Use H3/6 Pink/White for IGN2 ( Flex relay is factory default set to Ign2 )

Use an extra relay for IGN3.  Wire as follows :

30/40A SPDT Relay

Relay Pin 85 to Viper PINK (-) 200mA IGNITION 1 OUTPUTRelay Pin 86 and Pin 87 to +12V constant thru 20A fuseRelay Pin 30 to F150 IGN3Relay Pin 87A not used

Make sure Viper Red, RED / White and RED / Black all go to +12V constant.

You can use the same relay wiring for ACC2. As follows :

Relay Pin 85 to Viper ORANGE (-) 200mA ACCESSORY OUTPUT

Relay Pin 86 and Pin 87 to +12V constant thru 20A fuseRelay Pin 30 to F150 ACC2Relay Pin 87A not used

Soldering is fun!

Thanks for the help....Should I disable the unit until I have the time to fix the wiring? Or is it OK to run it the way it is, other than the "service engine soon" light?

I can't say for sure, but I would disable it. I know that on many GM's if you don't power the 2nd ignition it can cause damage to the transmission system. Not sure if that is similar on your for, but its probably not worth the risk.Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

Thanks!