Many vehicles will allow our TIPM Bypass Cables or TIPM Plug-In Relay Systems to work, but please note that we have not been able to test every vehicle. Note that any Ram truck 2010 and older cannot be bypassed (read below for details and solutions). For our parts to work properly, the following must be true:
- The order of components in the fuel pump circuit must be: +12 VDC ---> Fuel Pump Relay ---> Fuse Slot ---> Fuel Pump.
You can easily test for this arrangement using a test light or multimeter by detecting the absence of 12 VDC on the fuel pump fuse slot when the vehicle is off. As long as your fuel pump relay is not "stuck on" at the time, detecting 12 VDC on the fuel pump fuse means a TIPM cable will not work. To summarize, you must NOT detect 12 VDC on your fuel pump fuse for a TIPM cable to work and your relay must come before the fuse slot when power flows through the circuit to the fuel pump. Most Dodge, Chrysler, Ram, Jeep, and VW vehicles made from 2011 and after have this arrangement which permits a TIPM Bypass Cable or TIPM Plug-In Relay System to work properly.
If a fuel pump relay is downstream of the fuse slot, you can't easily test the relay and you can't inject power to feed the pump. This particular fuel pump circuit would look like the following: +12 VDC ---> Fuse Slot ---> Fuel Pump Relay ---> Fuel Pump. Many 2010 and older Dodge Ram trucks cannot utilize a TIPM cable or easily test the relay because the fuel pump relay comes after the fuse and you'll detect 12 VDC on the fuel pump fuse when the vehicle is off.
Since a fuel pump relay failure often means no power at the fuse or pump when the vehicle is starting or running, the arrangement of the circuit shown shown below benefits us since we can inject +12 VDC power via a TIPM test/bypass cable into the 20 amp fuse slot to power the fuel pump. For details, see our wiring diagrams section. Any alternate power source for the cable (ie. cigarette lighter, run/start relay, etc.) must ideally provide 12 VDC only when the vehicle is starting or running.
If you own a 2007-2010 Ram truck, we can only recommend a used TIPM at this time since none of our products will work and a TIPM repair is very difficult due to surface mount relays that are very close to each other. The same used TIPM recommendation likely applies to Chrysler 200/300, Dodge Charger, and Dodge Avengers. We have heard of some success with a 2009 Dodge Challenger.