Omron external relayMany people don't know if their vehicle has an external fuel pump relay that was installed per the recall. The vast majority of 2011-2013 Dodge Durango and Jeep Grand Cherokee owners likely already have an external relay - perhaps installed during a trip to the service department of their local dealer.  Most other vehicles DO NOT have an external relay installed. This external relay was the manufacturer's "not so elegant" way to bypass a faulty fuel pump relay in the cheapest way possible, in that it involved cutting two wires under your TIPM and tapping into a third wire.  If you have an external fuel pump relay installed, you cannot implement any of our solutions to resolve a fuel pump relay issue unless you reverse the process by joining the cut wires under the TIPM (see instructions here).

If you do not have an external relay, we have a variety of simpler, cheaper, and easier to install alternatives that don't require cutting wires under your TIPM.

To check if you have an external relay:

  1. Locate your fuse box (TIPM) under the hood of your vehicle.
  2. Open the black plastic lid and locate a large hex hut in the upper left corner that is your positive battery connection. This connection feeds 12 VDC to your TIPM via a large diameter wire (about as thick as your thumb).
  3. If you have an external relay, you'll also notice a second smaller wire (normally red or orange in color) under the hex nut that runs outside the TIPM.
  4. Follow this wire and it should lead to an inline fuse and then the external relay - a small black box that is normally attached close to the headlight within 1-2' of your fuse box. It normally has the manufacturer's name "Omron" displayed on top in white letters.  This Omron G8JN external relay is also available in our web store.
  5. Three additional wires travel from the Omron relay under the TIPM to the location where the wires were cut/spliced within your wire harness.

Note that many people continue to have problems with these Omron external relays after several years.  To add further pain, there is now a second recall where the failing Omron external relays are replaced with a different external relay.


TIPM Location   External relay location  External relay location


If Problems Still Exist After The External Fuel Pump Relay Is Installed

If you're stuck on the side of the road with a vehicle that won't start, try your remote start or tap/hit the Omron external relay in case the normally closed pins are welded together. Trust me, these tricks have saved others. Or, remove the external relay from the wire harness and jumper pins 30 and 87 to provide full-time power to the fuel pump until you get home.

If you already have an external relay and starting problems continue, you're likely stuck with it because the dealer cut wires under your TIPM that completely disconnected the fuel pump circuit inside the TIPM. The only way around it is to  reverse the dealer modification and use one of our TIPM Solutions. However, recent reports indicate that replacing the external relay can help. Fortunately, this relay replacement is simply a matter of unplugging the old and plugging in the new unit and it should take less than 5 minutes to do so. We have them in stock and ready to ship the same day as the order is received. Note that the part we sell is only the relay portion, without the wires and receptacle that should already be installed and soldered to your TIPM wire harness. The relay should be attached to the body of the vehicle near the front headlight and TIPM using a one-way plastic fastener. This fastener isn't designed to come out easily, so you may need to break and replace it with something similar.

If A New External Relay Doesn't Help

  1. Is there gas in the vehicle?
  2. Is the fuel contaminated?
  3. Is your gas gauge working properly? If you've been at 3/4 tank for weeks, chances are you're out of gas.
  4. Is fuel pump working properly? You can remove the external relay from the wire harness and jumper pins 30 and 87 on the wire harness when the vehicle is off to test fuel pump electrically.
  5. Is fuel pump providing adequate pressure? Perform a fuel pressure test (normally 50 psi).
  6. Try starting the vehicle in neutral
  7. Verify that all TIPM connectors are adequately seated and secured to the bottom of the TIPM
  8. Check all fuses and plug-in relays under the TIPM lid
  9. Is your cam or crankshaft sensor working properly? If not, replace.
  10. As a last resort, park your vehicle in front of the nearest dealer, pop the hood, and place a sign that reads "P.O.S." with a large yellow lemon. You'll likely have someone from the dealership ready to help you in less than 30 minutes. Trust me, I'm almost there with my 2011 Dodge Durango, which is the worst vehicle I've ever owned.
  11. Buy a new TIPM if all else fails. 

Installing The Complete External Relay Kit (with Wire Harness)

This repair option can be performed by your dealer if your vehicle is recalled, or you can attempt to install an external relay on your own. This solution is Star case #S1308000399 where you'll need to purchase a external fuel pump relay with wire harness to take the place of the defective TIPM-mounted fuel pump relay. You can also search for part number CBP4P541AB or CBWPR091AA on the internet, which is the complete external relay kit. The bad thing about this solution is that it involves cutting, soldering, and heat shrinking several wires in multiple wire harnesses. After going this route, you'll always need to count on the external fuel pump relay (even if you eventually purchase a new TIPM) because you've cut the fuel pump wires leading to the TIPM fuel pump relay. Most of our products will not work to test your fuel pump, fuel pump relay, or bypass a faulty relay once TIPM wires are cut.

The September 20, 2014 recall performs the above modification, which is a cheap and easy way for Dodge to repair faulty fuel pump relays. This is Dodge/Jeep's version of a duct tape, zip tie, Elmer's glue fix. Manufacturers should replace each TIPM or provide a TIPM that is serviceable!!

Many owners had difficulty in purchasing the external relay kit from their dealer because their dealer claims the kits are intended for Durango and Grand Cherokee owners only. We continue to receive many calls from owners who vehicle still will not start after the recall modification has been performed.

External relay kit

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