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Aloha: Recently purchased a backup cam system that requires me to find ignition-switched power connection in the engine compartment. Have yet to find such.
Hoping someone in the forum can advise or refer me to Puna/Pahoa auto electrician type
Vehicle is 1992 Toyota V63e
Appreciate any help-- would like to be able to use what I have spent many hours preparing, routing cables, installing cameras, etc.
Mahalo in advance.
-dwajs
-dwajs
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There should be a fuse box under the hood, although it seems odd that you have to get power from there?
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Yes, fuse box under hood - none of which supply switched power-- at least what my multimeter has so far been able to determine.
System terminates at a 'multiplexer' which contains all conx - power to monitor, camera power, and triggers--designed to live in the engine compartment.
-dwajs
-dwajs
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Could you trace another ignition switched item in the car, like the radio, and see where it leads to?
"I'm at that stage in life where I stay out of discussions. Even if you say 1+1=5, you're right - have fun." - Keanu Reeves
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Yes, did that, all the accessory devices terminate in the interior (passenger compartment) fuse box
-dwajs
-dwajs
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I am a retired Toyota technician. The under hood fuses are usually always before the ignition switch as you have found. you may have to go to the relays there and see if any are switch controlled. they are the small square plastic relays next to the fuses. If you find a leg that is ignition sourced there it is easy to strip your wire and place it there when you plug the relay back in as long as your wire is not too thick
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Mahalo Mac - are these the ones inside the fuse box, with 5 legs inscribed on the top? I think labeled EFI on one side and PMA and PMB on the other side? Tomorrow I will check it out and let you know what I find. Leaving now for the evening...
-dwajs
-dwajs
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yes those are the ones, the fuse box plastic cover usually says what each relay controls too. I usually use a 12 volt test light to find the leg with the power or you can use a voltmeter. let me know what you find when you get back to it
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Aloha Mac et. al. : Mahalos to you, as I can happily report success at not only finding switched power, but conveniently located and (as it turns out) easily accessible. Leg 1 showed 12v cold, and everyone else zero, so I switched on and remeasured. sho nuff, leg three was now hot.
after some consideration of the variables involved, decided to drill into the side of the support for the leg, and pass a new tinned wire through the hole at the bottom of the casing.
Then carefully maneuver the wire into a stable position, reinstall relay, and push down hard and evenly. Snapped the fuse box cover back into its snapped-state, Finished up by connecting the new wire to the too-thick (3strands entwined) original power harness and tucking the multiplexer up against the sidewall making sure to clear the hood closure mechanism.
Here's a look at some of the work fyi...
https://www.flickr.com/photos/9416222@N0...745611669/
-dwajs
-dwajs
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looks good to me. Glad you were able to find switched power
