dakal Posted April 9, 2009 Share Posted April 9, 2009 can some tell me how to wire the ballast resister. i can't find it in the wiring diagrams i am privey too. :popcorn: :wall: Link to comment Share on other sites More sharing options...
Pete M Posted April 9, 2009 Share Posted April 9, 2009 Are you installing a resistor in a truck that never had one? Link to comment Share on other sites More sharing options...
dakal Posted April 9, 2009 Author Share Posted April 9, 2009 no. i'm rewiring the vehicle and the wiring kit doesn't come with wires for the br. Link to comment Share on other sites More sharing options...
Pete M Posted April 9, 2009 Share Posted April 9, 2009 What kit are you using for the re-wiring? Link to comment Share on other sites More sharing options...
dakal Posted April 9, 2009 Author Share Posted April 9, 2009 ron francis ie wireworks they are cool to work with, i could ask them, but i went the club way. :yes: Link to comment Share on other sites More sharing options...
jtdesigns Posted April 10, 2009 Share Posted April 10, 2009 here's the wiring diagram from an 89 FSM, brought to you by Mr. Wild Link to comment Share on other sites More sharing options...
Pete M Posted April 10, 2009 Share Posted April 10, 2009 You might need to ask them. I can't say for sure if they're using the same colors and what-not. But if it makes you feel any better, the resistor is technically not needed to run the truck. It was added in 1988 as a means to quiet the pump noise. Link to comment Share on other sites More sharing options...
dakal Posted April 10, 2009 Author Share Posted April 10, 2009 thanks to mr wild and mr pete. :clapping: :clapping: :clapping: :clapping: :clapping: the simple version hook up looks like one side goes to or/bl wire going to fuel pump. the other side goes to a10, green wire of the ecu. i'll check, when rain permits, to see the wire colors. i couldn't find it in great lakes xj fsm. i will check again though. still can't also, the next time i talk to ron francis i'll ask them for back up info. i've got this picture of turning the key, and a mushroom cloud goes up from the truck. :ack: the wiring is going well. i'm not using a headlight switch, i am using toggle switches, so wiring the lights up is the next brain freeze. :drool: :rotf: :drool: :rotf: :drool: :rotf: Link to comment Share on other sites More sharing options...
Pete M Posted April 10, 2009 Share Posted April 10, 2009 When all is said and done, be sure to share the details of how you ordered, cost, and what not so that other guys with desperate wiring situations can see what it'll take to redo everything. I'm sure you're taking LOTS of pictures, yes? Link to comment Share on other sites More sharing options...
dakal Posted April 10, 2009 Author Share Posted April 10, 2009 :ack: i haven't been taking lots of pics, very few, but i am in a good place to start. i just started assembling the wires. i will post some tomorrow. :yes: Link to comment Share on other sites More sharing options...
cmelo Posted April 10, 2009 Share Posted April 10, 2009 Please take lots of pics and document well! :bowdown: Link to comment Share on other sites More sharing options...
cherokee Posted April 10, 2009 Share Posted April 10, 2009 Was the firewall connector/fusebox replaced or repaired? I know I'm not the only one that's seen them damaged on a manual truck before. Link to comment Share on other sites More sharing options...
dakal Posted April 10, 2009 Author Share Posted April 10, 2009 look carefully at one of the pics. you can see how messed up it is. Link to comment Share on other sites More sharing options...
cherokee Posted April 10, 2009 Share Posted April 10, 2009 What pictures? How good does the replacement seem? Link to comment Share on other sites More sharing options...
dakal Posted April 10, 2009 Author Share Posted April 10, 2009 wrong thread let you know when i am done wiring it. Link to comment Share on other sites More sharing options...
Eagle Posted April 11, 2009 Share Posted April 11, 2009 thanks to mr wild and mr pete. :clapping: :clapping: :clapping: :clapping: :clapping: the simple version hook up looks like one side goes to or/bl wire going to fuel pump. the other side goes to a10, green wire of the ecu. Yeah, that's the simple version. But ... it ain't that simple. There's a bypass involved. The ballast resistor is in the circuit when the engine is running, and when the key is first turned on, to run the fuel pump and bring the system up to pressure. When the key is turrned to START, the ballast resistor is bypassed and a more or less parallel circuit sends full 12 volts to the fuel pump during starting. Once you release the key and it's back in the RUN position, the bypass is de-energized and the circuit again goes through the ballast resistor. Link to comment Share on other sites More sharing options...
dakal Posted April 11, 2009 Author Share Posted April 11, 2009 i was looking at the wiring diagram today and one wire went to the starter relay position # f and the other to the ecu. wouldn't the ecu do the transfer? Link to comment Share on other sites More sharing options...
jtdesigns Posted April 11, 2009 Share Posted April 11, 2009 thanks to mr wild and mr pete. :clapping: :clapping: :clapping: :clapping: :clapping: the simple version hook up looks like one side goes to or/bl wire going to fuel pump. the other side goes to a10, green wire of the ecu. Yeah, that's the simple version. But ... it ain't that simple. There's a bypass involved. The ballast resistor is in the circuit when the engine is running, and when the key is first turned on, to run the fuel pump and bring the system up to pressure. When the key is turrned to START, the ballast resistor is bypassed and a more or less parallel circuit sends full 12 volts to the fuel pump during starting. Once you release the key and it's back in the RUN position, the bypass is de-energized and the circuit again goes through the ballast resistor. Yeah some sort of bypass for sure.. And like you said I'm pretty certain the resistor runs parallel to the relay, but I think the resistor isnt ever by-passed, but always flowing power to pump, I think its the start-up 12 volts that switches off leaving the resistor flowing from ECU power source. But thats just what I get from crossing alot of years wiring diagrams, and I'm still not 100% certain thats the way it works out.. Link to comment Share on other sites More sharing options...
Wildman Posted April 11, 2009 Share Posted April 11, 2009 thanks to mr wild and mr pete. :clapping: :clapping: :clapping: :clapping: :clapping: the simple version hook up looks like one side goes to or/bl wire going to fuel pump. the other side goes to a10, green wire of the ecu. Yeah, that's the simple version. But ... it ain't that simple. There's a bypass involved. The ballast resistor is in the circuit when the engine is running, and when the key is first turned on, to run the fuel pump and bring the system up to pressure. When the key is turrned to START, the ballast resistor is bypassed and a more or less parallel circuit sends full 12 volts to the fuel pump during starting. Once you release the key and it's back in the RUN position, the bypass is de-energized and the circuit again goes through the ballast resistor. Yeah some sort of bypass for sure.. And like you said I'm pretty certain the resistor runs parallel to the relay, but I think the resistor isnt ever by-passed, but always flowing power to pump, I think its the start-up 12 volts that switches off leaving the resistor flowing from ECU power source. But thats just what I get from crossing alot of years wiring diagrams, and I'm still not 100% certain thats the way it works out.. Your right JT :bowdown: I just went back and looked up B12 splice{Page 9} (14OR/BK) and that comes from the starter Relay, forcing the full 12v to the pump, at the B1 splice, then letting the ballast resistor run the pump after the start up, from the Fuel Pump Relay. Link to comment Share on other sites More sharing options...
jtdesigns Posted April 11, 2009 Share Posted April 11, 2009 thanks to mr wild and mr pete. :clapping: :clapping: :clapping: :clapping: :clapping: the simple version hook up looks like one side goes to or/bl wire going to fuel pump. the other side goes to a10, green wire of the ecu. Yeah, that's the simple version. But ... it ain't that simple. There's a bypass involved. The ballast resistor is in the circuit when the engine is running, and when the key is first turned on, to run the fuel pump and bring the system up to pressure. When the key is turrned to START, the ballast resistor is bypassed and a more or less parallel circuit sends full 12 volts to the fuel pump during starting. Once you release the key and it's back in the RUN position, the bypass is de-energized and the circuit again goes through the ballast resistor. Yeah some sort of bypass for sure.. And like you said I'm pretty certain the resistor runs parallel to the relay, but I think the resistor isnt ever by-passed, but always flowing power to pump, I think its the start-up 12 volts that switches off leaving the resistor flowing from ECU power source. But thats just what I get from crossing alot of years wiring diagrams, and I'm still not 100% certain thats the way it works out.. Your right JT :bowdown: I just went back and looked up B12 splice{Page 9} (14OR/BK) and that comes from the starter Relay, forcing the full 12v to the pump, at the B1 splice, then letting the ballast resistor run the pump after the start up, from the Fuel Pump Relay. OK.. That makes better sense. so the fuel pump relay is always flowing through the resistor (when ecu is giving fuel pump relay a ground), and the pump gets its start up juice basically from the ignition switch switching the starter relay... correct??? Did you add that page to your photobucket? Link to comment Share on other sites More sharing options...
Wildman Posted April 11, 2009 Share Posted April 11, 2009 No, but I will in the morning........kind of late now for scanning :( I'll follow up on all the relevant pages that fall in this group :D Link to comment Share on other sites More sharing options...
jtdesigns Posted April 11, 2009 Share Posted April 11, 2009 No, but I will in the morning........kind of late now for scanning :( I'll follow up on all the relevant pages that fall in this group :D :thumbsup: Hey Pete........ Think you can merge this thread and http://www.comancheclub.com/forums/viewtopic.php?f=2&t=15820 Link to comment Share on other sites More sharing options...
Wildman Posted April 11, 2009 Share Posted April 11, 2009 JT..... Check your PM :D Link to comment Share on other sites More sharing options...
jtdesigns Posted April 11, 2009 Share Posted April 11, 2009 Another topic about the same for future reference http://www.comancheclub.com/forums/viewtopic.php?f=2&t=15820 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