Question about Ford E-150

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'03 f-150 pos bat termanel arced against the side of the truck. Now, the climate control screen is dark & the blower fan is allways on max & I had to pull the fuse to stop it. My power programer diagnostic read 1 falt...p1633, What the hell is a "power supply to the keep alive memery" & how do I fix it please

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  • www_first1sf Feb 06, 2010

    The "bat" is actually 2 brand new optimas-a Red top as the primary
    & Yellow top as the aux. These are installed through an isolater
    that I had just installed. Post instellation multimeter tests (as per
    isolator manufacture specific inst) confirmed the install was correct
    & complete.......well almost complete except for the protective
    boots that were going to protect the 4 termanals on top of the
    isolater. A set of keys was dropped causing "the arc" that
    iniatiated the code & climate control prob. The bats were not weak
    & the truck had not been jump started, or anything out of ordinary
    ops.

  • www_first1sf Feb 06, 2010

    How do I fix the "power supply to the (kam) &

    How do I fix the climate control's blank screen & make it work again



  • www_first1sf Feb 06, 2010

    Is my climate control toast ? or
    Did a fusable link hatch ? Which one ? Where is it

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  • Master
  • 2,926 Answers

You have fried a relay from letting the + side of the circuit touch ground. Your blower motor relay absorbed most of the "shock" and needs to be replaced. I have attached a picture of what It may look like. As far as the climate control, I believe it is wired to this same relay, if not you have a blown fuse for power to it or another relay that is now defective. I have read this post and was trying to get an idea of a place for you to start, without tracing individual wires with a voltage meter. The relays are not expensive to replace, however you may want to keep in mind that the solution can not be answered on this post without "hands on" diagnostics. Your relay box is located under the hood, with a removeable cover. Hope this helps.

'03 f-150 - 24841c2.jpg

Posted on Feb 06, 2010

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  • Master
  • 8,619 Answers

Hi


Thanks for using FixYa.
P1633 means KAM voltage is too low. Further it means that maybe sometime in past the battery voltage was below the specs at the PCM. The code is just a indicator for us to know that the computer learns as you drive and all the code is saying is that it lost its power to itself and can loose that learned information. The battery provides 12 volts to power everything, the car probably sat for a while and probably took a long time to start or had to be jumped off to start.... when the voltage got below 9 volts it set the code. May be you can take it to a mechanic and have him inspect the battery for being weak or is about to get dead, also make sure to check your battery connections. Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks
Rylee

Posted on Feb 06, 2010

  • Rylee Smith
    Rylee Smith Feb 06, 2010

    If the battery has been changed it should not give the code again, as I said check the connections to the battery. Please do accept the solution if the issue is resolved or else revert for further assistance.


    Thanks
    Rylee

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