Question about Toyota Avalon
It seems a good portion of your fuse panel is not powered up. Brake lights and door locks: those circuits, and the fuse for them, are "hot at all times". Radio, windows, directionals, and the heater/AC: those circuits and their fuses, are only "hot in run, accessory, or start". So key on should power up those circuits- allowing power to those fuses and circuits, often by the key switch turning on an accessory relay, or an ignition relay, and then power is fed to the fuses and circuits.
But since brake light circuit is also out (one of those "hot at all times" fuses), it does not sound like a problem with the ignition switch, but with a main power distributor that feeds the instrument panel fuse block: I believe this would be one of your maxi fuses in the under hood fuse /relay block. So check those fuses again, or get a wiring diagram to see how or where your fuse panel is supplied power. Power from the battery/alternator is fed into the fuse/relay block-the power distribution system-each maxi fuse (large amp carriers) is a distributor to several circuits. One fuse is for the ignition switch, one may be for the fuse panel, yours with no power on it. (The maxi fuses have largely replaced the old fusible links off the battery that were the power distributors.) Check your maxi fuses, use a test light to see if each is receiving power-all the maxi fuses should have power- all are "hot at all times".
Posted on Jan 01, 2014
Check you fusible links and circuit breakers. Not sure how you put the alternator on but you must disconnect the battery while hooking up the alternator.If you connected it wrong or arced it against something then its possible you popped a fusible link. Use a test light and test on both sides of your fusible links. Try that and see if it helps.
Posted on Jan 01, 2014
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Posted on Jan 02, 2017
to ss1957, i have exactly the same problem as yours. At first i thought the bulbs of both side are okay because the filaments (there's two on each) are intact. It turned out that they're not. The brake lights came back as soon as I replaced the bulbs.
Posted on Dec 19, 2008
This could be a combination of electrical issues, although i feel that the timing is coincidence in this case. When the combination is elec. windows, wipers, and dome lights this is indicative of the GEM module located behind your radio. The GEM (generic electronic module) is an electronic body control module that regulates electrical flow through a number of accessories.
These factory module boards are notorious for acting quirky by failing to ground intermittently until failing completely. I would be cautious in replacing ignition switches, locks, etc. as the issue can be also compounded by corrosion of the main battery ground wire in the engine compartment and which can cause frying of your under dash wiring into the main wiring harness which can get expensive (i speak from experience having had the exact same syptoms). My issues were that these symptoms occurred only in full ON. When in key BACK ACC mode, they disappeared.
New price for one of these modules is around $280-$300 and easily replaced.
Posted on May 21, 2009
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