power locks
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New User
Joined: Oct 2003
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From: Anchorage
power locks
i want to buy a door lock actuator from bulldog security (model 742) to put in my 91 f150 reg cab 4X4. i was wondering if anybodys had experience installing these? will it fit in my door? and is it powerful enough to open/close the locks?
New User
Joined: Jun 2003
Posts: 12
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From: Seattle area WA
I also bought a set of actuators and remote controls from CrimeStoppers. However I have not yet installed them on my new 2003 F-130 SC. The manual is not great and the online wiring color information and points to intercept is incomplete. So any ideas are welcome.
One general question I have is polarity? I know a battery has a +12V and a ground, so how can you have + or - polarity.
Thanks,
Willem-Jan
One general question I have is polarity? I know a battery has a +12V and a ground, so how can you have + or - polarity.
Thanks,
Willem-Jan
New User
Joined: Jun 2003
Posts: 12
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From: Seattle area WA
Thanks Bear Tracks,
Regarding the polarity it does go a little deeper though. I get your point of switching + and ground makin the selenoid going up or down, although my selinoids have five wires and do have an activation wire for both up and down. Where I am refering to is fi. negative polarity on the horn wire in the F-150. To basically hook up the horn activation wire I have to install a relay switch. I know how to do it, schemetic is with the online information, but I do not know why. To me it is a clear case of grounding one side of the horn to the scassis and having the hot side going to the horn switch. Off cource this is wrong, but why.
Thanks,
Willem-Jan
Regarding the polarity it does go a little deeper though. I get your point of switching + and ground makin the selenoid going up or down, although my selinoids have five wires and do have an activation wire for both up and down. Where I am refering to is fi. negative polarity on the horn wire in the F-150. To basically hook up the horn activation wire I have to install a relay switch. I know how to do it, schemetic is with the online information, but I do not know why. To me it is a clear case of grounding one side of the horn to the scassis and having the hot side going to the horn switch. Off cource this is wrong, but why.
Thanks,
Willem-Jan
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Joined: May 2002
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From: Chicago Area
It's wrong because, unlike home wiring, vehicle components can have the "switch" either before or after the load. That is, the horn could have "+" applied at all times and blow when grounded. Relays control high power draws, and also allow you to reverse the control polarity if necessary.
In the case of newer Ford power locks, it's pretty complicated because there is a central control module involved and the switching is different depending on what options (eg.; keyless, driver prioity) were factory installed/ available. Don't know the details for a '91, but you might want to get a shop manual. The other option is to hook each wire up through 10 A fuses which would blow if you guess wrong.
In the case of newer Ford power locks, it's pretty complicated because there is a central control module involved and the switching is different depending on what options (eg.; keyless, driver prioity) were factory installed/ available. Don't know the details for a '91, but you might want to get a shop manual. The other option is to hook each wire up through 10 A fuses which would blow if you guess wrong.
