no high beams
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Driver School Candidate
Joined: Jun 2004
Posts: 1
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From: North Carolina
no high beams
My RX-300 has no high-beams / DRL's.
I hear a relay click, the high-beam dash indicator comes on and the fog lights switch off. I changed both lamps. Wiring and sockets were clean.
What's my next step ?? (I'm a retired EE but don't have a clue how this is wired.)
Thanks.
I hear a relay click, the high-beam dash indicator comes on and the fog lights switch off. I changed both lamps. Wiring and sockets were clean.
What's my next step ?? (I'm a retired EE but don't have a clue how this is wired.)
Thanks.
CL Community Team
Joined: Apr 2001
Posts: 16,533
Likes: 1,379
From: Austin, TX
EE is always an EE retired or not 
I too have not figured out just how the drl's work for sure. The high beam fillament glow at 1/2 brightness. My guess is that for drl, the lamps make a series connection and for regular operation they are in parallel [all done by relays]. For this theory to hold, the bulbs must have a mechanism to isolate from chasis (gnd). How???
Sorry for a half baked answer. Take it for its worth.
Salim
I too have not figured out just how the drl's work for sure. The high beam fillament glow at 1/2 brightness. My guess is that for drl, the lamps make a series connection and for regular operation they are in parallel [all done by relays]. For this theory to hold, the bulbs must have a mechanism to isolate from chasis (gnd). How???
Sorry for a half baked answer. Take it for its worth.
Salim
Pole Position
Joined: Dec 2002
Posts: 376
Likes: 0
From: Massachusetts
Yes, the DRL are in series and it is done with relays (several) to take care of the ground issue. The diagrams are available in the books. Here is what you need.
One EE to another....
and since we can't make out the diag. send me a private e-mail and I'll forward the larger file with readable detail.
One EE to another....
and since we can't make out the diag. send me a private e-mail and I'll forward the larger file with readable detail.
Last edited by ederny; Jun 21, 2004 at 05:54 AM.
Lexus Champion
Joined: Jan 2003
Posts: 2,754
Likes: 6
From: Colorado
Re: no high beams
Originally posted by stpbg
My RX-300 has no high-beams / DRL's.
I hear a relay click, the high-beam dash indicator comes on and the fog lights switch off. I changed both lamps. Wiring and sockets were clean.
What's my next step ?? (I'm a retired EE but don't have a clue how this is wired.)
Thanks.
My RX-300 has no high-beams / DRL's.
I hear a relay click, the high-beam dash indicator comes on and the fog lights switch off. I changed both lamps. Wiring and sockets were clean.
What's my next step ?? (I'm a retired EE but don't have a clue how this is wired.)
Thanks.
I'm not an EE, just a handyman around the house.
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