Discussion and questions related to the course Motorsport Wiring Fundamentals
I'm looking for some information in regards to wiring my AEM X Series wideband to my Link G4X. I have a number of questions I'm hoping you'll be able to support in answering, while my hands on wiring skills I am very confident in (Crimping, Soldering etc) my technical knowledge on some of the processes is lacking as it's been 10 years since I did my Motorsport Electronics module at University and haven't needed those skills in my automotive career since.
1. How are resistors wired in, in parallel - I.e The physical side of exactly how to wire in a resistor, where in the wire, how is it joined? A wiring diagram is not helping me understand how it should look in the real world.
2. The Link G4X has terminating resistors in the ECU, but the AEM CAN wiring calls for 120ohm Resistors in parrallel at the end of the BUS. So exactly where do the resistors need to so?
Currently the wiring goes
Bosch 02 sensor > Connector > Harness to Gauge > Gauge Power Harness > CAN F Connector > CAN PCB Harness > Link G4X
In this chain above, where do I need to wire in the resistors?
Any help would be great
A 120ohm resistor shorting across the CAN H/L wires somewhere close to the AEM connection. For a road car I normally just crimp the legs of the resistor directly into the DTM sockets along with the wires, then RTV into the connector housing for strain relief instead of the original silicon seal.
Thanks for the feedback, I've tried to draw out an idiots guide, could you confirm if the assumption below is correct?
Yes something like you have drawn will do. It can be on either side of the DTM - AEM or Link side is fine.
A couple of pics attached, this is from a two pin DTM but you get the idea. Practice on a spare terminal first as the lengths of the resistor legs take a bit of trial and error on the first go.
Great, thanks for confirming that i’m on the right page Adam, picture speaks a thousand words for my little brain!
Cheers for the support!