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  1. #1
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    Default 6500 manifold heater

    I have a 2007 6500 4WD. I bought it a year ago with 325 hours on it. I used to see the manifold heater light come on when I first turned on the key, now it does not, and when temps are in the 20's, it has to crank a lot to start. I found the manifold heater and light on the wiring diagram, and I think I have the right timer relay-blue, four prong, mounted high up inside on the left rear of the engine compartment. I see on the wiring diagram that the timer sends juice to the manifold heater, but that sure doesn't seem right, because the wires from the timer relay are a lot smaller gauge than the wire going to the heater, anyway the wiring diagram said they had a 10 amp fuse in line. I checked all the fuses in the fuse panel. They were fine. None are listed as the heater fuse. But behind that fuse panel, there were two fuses taped to the wiring harness. One of them was a 10 amp that was blown. I replaced it, I still do not see the heater light come on with the engine cold. If anyone can shed the light on when this heater is posted come on, how long it is supposed to come on, where the components are located, where the heavy wire going to the heater goes, etc. I sure would appreciate it. Thanks, Doug

  2. #2
    New Member
    Join Date
    Sep 2010
    Posts
    18

    Default Re: 6500 manifold heater

    I located the timer relay for the intake heater, it's just below the long tube of the intake, mounted on the upper brace. It was getting voltage, but not making the high amperage connection to the heater. Since I figured I had nothing to lose, I took it apart, blew it out with air, sprayed contact cleaner into the relay, blew it out again, and it works! Apparently dirt had gotten into the contacts. I wish I could figure a way to get the circuit board off, so I can get to the contacts to manually clean them. The timer relay is $200, if it messes up. I will replace it with a starter solenoid from an older Ford and use a momentary pushbutton to activate it. Thanks, Doug

    ttp://www.billstractor.net/tiihefor65ma.html

    TIMER (INTAKE HEATER) FOR 6520 MAHINDRA TRACTOR

    5559087R916520Regular price: $205.00Sale price: $199.00

    Quote Originally Posted by sundug View Post
    I have a 2007 6500 4WD. I bought it a year ago with 325 hours on it. I used to see the manifold heater light come on when I first turned on the key, now it does not, and when temps are in the 20's, it has to crank a lot to start. I found the manifold heater and light on the wiring diagram, and I think I have the right timer relay-blue, four prong, mounted high up inside on the left rear of the engine compartment. I see on the wiring diagram that the timer sends juice to the manifold heater, but that sure doesn't seem right, because the wires from the timer relay are a lot smaller gauge than the wire going to the heater, anyway the wiring diagram said they had a 10 amp fuse in line. I checked all the fuses in the fuse panel. They were fine. None are listed as the heater fuse. But behind that fuse panel, there were two fuses taped to the wiring harness. One of them was a 10 amp that was blown. I replaced it, I still do not see the heater light come on with the engine cold. If anyone can shed the light on when this heater is posted come on, how long it is supposed to come on, where the components are located, where the heavy wire going to the heater goes, etc. I sure would appreciate it. Thanks, Doug

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