Question about Ford Aerostar

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1991 FORD aEROSTAR. Parking lights will not go off. Disconnected headlight switch, same problem. disconnecting battery for temporary solutin.

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Relay must have shorted on. Look for a relay in the engine compartment relay box labeled PKLP or PARK. Pull it out and the lights should go out. When you push it back in, it should click. If it doesn't click but the lights come on, the relay is shorted on. Try putting a different realy in the socket to make sure this is the problem. Let me know if you have any questions.

Posted on Nov 07, 2010

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  • urlstachel Nov 07, 2010

    Welllllll, that solved nothing.
    The parking lights are as bright as ever . . .hmmmm . . .
    Swich connector is seperated from switch, the relays, 4 at all, are resting comfortably next to my computer, reinserting and replacing did zilch . .
    Is there a possibility, that a B source has managed to close the circuit? Like: A worn thru 20 year of connection ??? Break-down in 1991 insulation??? Do I need to trade the nicely running van in on a newer piece of junk??? and make it some one else's problem???
    Just kiddin', I want to find and fix!
    Got me stumped.

  • Jeffrey Turcotte
    Jeffrey Turcotte Nov 07, 2010

    yes, your car is haunted. Unfortunately I do not have the diagram. Usually it's the switch or the relay. I've never seen them work without the relay. Was there maybe damage to the relay box? Maybe terminals under the box are shorted? Was one of the relays marked PARK, or what were the labels? Maybe there's another box with a few more relays. Seems to me some of the Fords had a few relays mounted on the firewall near the brake master cylinder...

  • urlstachel Nov 07, 2010

    Perhaps, i need some clarification?
    The only "set of relays", which I found, are on the left, inside engine compartment, near the hood by the battery, By the intermediate relay, by the brake master cylinder. getting to that location required a few extra cuss words.
    No relay panel, by the passenger kick panel and I just ain't found nothing else. Did I miss something? Other than the fuse box I have not found anything that resembles plug in relays. I did chunk the $19.95 parts store bought , useless "repair " manual on the burn pile.

    Haunted, you say?

    I'm better with large displacement, ship borne Diesel engines and automobiles haunt me, often.

    Well, Mr. Ghost Buster, lets chase this one down.

  • Jeffrey Turcotte
    Jeffrey Turcotte Nov 07, 2010

    The extra relays I'm thinking of were not in a box. Maybe they are on the other side.
    I have another idea though. We have a Ford expert that would probably know this off the top of his head. His moniker is "emissionwiz". If you were to put in a new problem request with his name up front on it, he may see it and help you out. Sorry I was not successful.

  • urlstachel Nov 07, 2010

    I thank you for your attempt. Nothin' ventured, nothin' gained.
    I shall try as you have suggested.
    I'll delay the 'accidental" spark in the engine compartment for a while . . .LOL. Have a great day and iffen and when I get a positive resolution, I'll post the repair.



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