donald.wade3 Posted March 27, 2020 Share Posted March 27, 2020 About: 89 SWB Pioneer, auto, 96/97 HO with all Renix components to include harness. Things I’ve done so far, open cooling system, several ground refreshes, replaced fuel filter, o2 sensor, replaced spark plugs, replaced PS pump, VC, Oil pan, RMS gaskets, cleaned TB, IAC, TPS,gauge cluster swap, headlight relay harness and bed lined the interior and redid the headliner. Where I am now is the comanche has been sitting for a little while. It has started dieseling. So I’ve decided to run it hard for a few times and try to clean some carbon out. But before that I want to redo the fuel pump relay. The PO has hardwired it with a hot wire from the ACC pin on the fuse block. Bypassed the ballast and wired in the efan to a vac harness. The question is which orange and black wire is from the ECU and which one goes to the pump. One of them will trigger the pump with the key on the other one does nothing. I have messed with the OEM relay and nothing happens. It doesn’t die or stall. Thoughts are to run a stand-alone relay in place and run a fuse to the battery, then connect to the wires I have exposed. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 27, 2020 Author Share Posted March 27, 2020 Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 27, 2020 Author Share Posted March 27, 2020 Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
jdog Posted March 27, 2020 Share Posted March 27, 2020 what happens when you re-connect the ballast? Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 27, 2020 Author Share Posted March 27, 2020 If I remember correctly, nothing. I believe the PO ran the red wire to the fuse block in the cab to the acc port for power possibly when they did the swap or had issues with the ballast and just bypassed it. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
jdog Posted March 27, 2020 Share Posted March 27, 2020 I would test the ballast and hook it back up, you can bypass by just connecting the wires together, but if they have a power wire ran to it you might want to figure out why Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 28, 2020 Author Share Posted March 28, 2020 Either way as it sits I would still like to have some sort of protection. I’ve just replaced both the ignition and headlight switches thst had partially melted the harness. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ωhm Posted March 28, 2020 Share Posted March 28, 2020 On the fuse box, are you running a 15A fuse for the radio? Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 29, 2020 Author Share Posted March 29, 2020 On the fuse box, are you running a 15A fuse for the radio? I believe I am. I can check a little later. Away at the moment. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 30, 2020 Author Share Posted March 30, 2020 I am running a 15a fuse in the radio slot. The red wire it the ACC hot for the fuel pump. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ωhm Posted March 30, 2020 Share Posted March 30, 2020 RADIO fuse is what protects that ACC outlet. Happy PO didn't up the amp rating on that fuse. This set up runs Fuel Pump motor current thru the IGN SW, thru RADIO fuse, out ACC outlet and then to Fuel Pump motor. It actually taps a different Fusible Link. On the Starter Relay is the ORN/BLK wire connected to the BAL terminal? Also check condition of all your fusible links. Green ones in particular. Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 30, 2020 Author Share Posted March 30, 2020 RADIO fuse is what protects that ACC outlet. Happy PO didn't up the amp rating on that fuse. This set up runs Fuel Pump motor current thru the IGN SW, thru RADIO fuse, out ACC outlet and then to Fuel Pump motor. It actually taps a different Fusible Link. On the Starter Relay is the ORN/BLK wire connected to the BAL terminal? Also check condition of all your fusible links. Green ones in particular. So that would sort of explain why the Truck shut off while driving on the hwy several months ago. I lost radio, wipers, signals, and interior lights. Just overload on the ignition switch. I replaced that with new and replaced the fuses and everything was good than. I did try to pull each relay with the truck on with no change. What is the the BAL terminal?Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ωhm Posted March 30, 2020 Share Posted March 30, 2020 Fuel Pump Ballast Resistor Terminal (BAL) Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 31, 2020 Author Share Posted March 31, 2020 I will give it a once over tomorrow. The PO has this thing all crazy wired. Just trying to figure it all out. I do appreciate the help. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 31, 2020 Author Share Posted March 31, 2020 Removed he power wire from the 2 orange and black wires for the Ballast. Connected them to the ballast an no start. No fuel. Did the relay dance with the 4 next to the battery. Still no start. So the next question is, is the ballast bad? Everything works with the bypass. All the connections look good and the ones that were questionable were cleaned. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ωhm Posted March 31, 2020 Share Posted March 31, 2020 3 minutes ago, donald.wade3 said: So the next question is, is the ballast bad? Ohmmeter will tell you if ballast is OPEN circuit. Disconnect wires. Good reading would be ≈1.1ohms. Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 31, 2020 Author Share Posted March 31, 2020 If the ballast is bad can I option for thisSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ωhm Posted March 31, 2020 Share Posted March 31, 2020 Just bypass ballast resistor (connect wires at ballast together). Purpose of ballast was for pump noise reduction/could extent pump life. Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 31, 2020 Author Share Posted March 31, 2020 Initially the ballast was bypassed. But I want to add a level of protection for piece of mind with a relay. I want to take the power off the ignition switch and out of the fuse block. I’ve been stranded 2times, both with the fuse block and the circuits inline with the hot wire to the “bypass”Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ωhm Posted March 31, 2020 Share Posted March 31, 2020 2.3ohms is double it rating. Either bad ballast or that just the way the meter reads. If you go to buy a new ballast bring meter with you. Measure new ballast at the store. Same reading, don't buy it. Myself, if everything works fine with the ballast bypassed leave it like that (til new ballast, if needed). Easy for me to say since it not me stranded in the center lane on the highway during rush hour traffic. Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 31, 2020 Author Share Posted March 31, 2020 I think I’m just going to hook everything back up the way it was and redo the e fan to a relay and switch. They were connected on the same circuit somehowSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ωhm Posted March 31, 2020 Share Posted March 31, 2020 Your vehicle, your call. Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 31, 2020 Author Share Posted March 31, 2020 Your vehicle, your call. I appreciate all your help with this. Thank youSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Ωhm Posted March 31, 2020 Share Posted March 31, 2020 Link to comment Share on other sites More sharing options...
donald.wade3 Posted March 31, 2020 Author Share Posted March 31, 2020 While digging a little further found this cluster of crap. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now