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Where is the drl relay - Cars & Trucks

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Will need to know the vehicle model etc to be precise but generally in the interior fuse box or under the hood fuse box

Posted on Nov 21, 2014

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Posted on Jan 02, 2017

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Highbeam lights very dull on 1999 Geo prism? Put new wiring plug(?) Any idea what the problem is? on and change dimmer relay with no luck! Ant


are you in USA.?
are you in Canada with mandatory DRL lighting?
we can not guess that,
DRL car is complex.
DRL has a 20 pin module just for DRL, crazy complex.
the FLASH on DRL grounds the HL directly bypassing DRL relay
so is super important the FLASH test.
There are 2 systems used, the toyota uses hot all time headlights
(via the HL relay and dimmer relay)


I need this?
is it dim on high, yes,
is it dim on low, no.
is it dim , when you push the lever to FLASH.??????
if flash works we know why it fails. see? (paths)
see?
if high beams and FLASH are dim, then DRL relay bad.
(can be other failures., for sure even wires bad)

its just a:
Toyota Corolla. Gen 6 to 8. (in snake skins)
if you have voltmeter this is child's play , really
finding point of voltage drop tells you what is wrong
find a shop with sparks guy? be best or by a meter and learn>?
guessing can take a long long weekend.
is labor time not a matter to you or down time?
ok I pulled up your cars HL schematic.
DRL is super complex
id pull the DRL module and look for burned pins
they love to do that DRL does.
so got DRL
and does FLASH work right>?

Jan 21, 2017 | Geo Cars & Trucks

1 Answer

No low beam. Good high beam. No day lights. What's wrong?


No on the fuse . The LH HDLP and RH HDLP fuse in the fuse block - under hood, supply battery positive voltage to both low and high beam lamps at all times. For manual operation, when the headlamp switch is in the ON position, the headlamp switch supplies ground directly to the headlamps and to the body control module (BCM) on the headlamp low or high beam signal circuit, depending on the position of the headlamp dimmer switch. The BCM uses this signal to determine if the conditions are present to illuminate the daytime running lamps or park lamps.
The headlamps may be turned on 2 different ways. First, when the driver places the headlamp switch in the ON position, for manual operation. Second, with the headlamp switch placed in the OFF position activating automatic lamp control (ALC).For ALC operation, the BCM receives a signal from the ambient light sensor indicating a low or high ambient, outside, light level. Under low light conditions the BCM grounds the headlamp relay control circuit energizing the headlamp control relay. The now closed relay supplies ground through the headlamp switch to the headlamps and the BCM on the headlamp low or high beam signal circuit, depending on the position of the headlamp dimmer switch. When the BCM grounds the headlamp relay control circuit it also grounds the park lamp relay control circuit illuminating the park lamps. The headlamp relay is grounded at G203.
Daytime Running Lamps (DRL)
The low beam headlamps operate at reduced intensity when in daytime running lamps (DRL) mode. The ground circuit to the switch side of the DRL relay has a resistor in-line to reduce the intensity of the low beam headlamps for DRL operation. The body control module (BCM) receives a signal from the ambient light sensor indicating a low or high ambient, outside, light level. Under daylight conditions the BCM grounds the DRL relay control circuit energizing the DRL control relay. The now closed relay supplies ground directly to the low beam headlamps and to the BCM on the headlamp low beam signal circuit. The low beam headlamps now illuminate with reduced intensity. The DRL relay is grounded at G203. Any time the headlamps are illuminated the DRL will not illuminate. Manual park lamps do not effect DRL operation.

Feb 23, 2016 | 2005 Chevrolet Equinox LS

1 Answer

Which fuse is for the daytime running lights for a 2005 Chevy Siverado?


The DRL 10-amp fuse in the underhood fuse block supplies battery positive voltage to the DRL relay switch contacts and relay coil. When the BCM energizes the DRL relay , the DRL receive voltage on the DRL supply voltage circuit.

Feb 01, 2016 | 2005 Chevrolet Silverado

1 Answer

Where is the DRL relay located?


There is no DRL relay , has a lamp control module .
The daytime running lamps (DRL) activate under the following conditions:
?€¢
The ignition switch is in the RUN position.


?€¢
The ambient light sensor indicates daylight.


?€¢
The vehicle is not in the PARK position.

When the above conditions are met, the lamp control module (LCM) supplies battery positive voltage (B+) to the low beam headlamps through CKT 589 (GRY), the DRL resistor, and CKT 12 (TAN). The DRL resistor reduces the voltage supplied by the LCM. The low beam headlamps light at a reduced intensity. The DRL disable if the vehicle is placed in the PARK position. When the ambient light sensor indicates darkness, the low beam headlamps automatically switch from a reduced intensity to a regular intensity.
Lamp Control Module (LCM)
In the center of the IP, below the center heater outlets

Nov 17, 2015 | 1998 Oldsmobile 88

1 Answer

Loction of hadlight mduel


which one?
what are the symptoms. must i help blind?
there are these parts. (maybe)
head lights.
relay(s) module.
DRL module.
wires and connectors
HL switch
HL Fuses.

the FSM covers this ,so does alldata.com (log in?)
i have a 04, and the relay are on cab left fuse box.
mine has DRL, dayligh running lights option (i hate it)
does yours. its very much different, and DRL is way less reliable.
the DRLs love to MELT on Suzuki cars. (trash)
I'lll ASSume its non DRL here i the drawing,
got a voltmeter?we can find true cause in minute work.


here is the schematic
small photo sucks, here at fixyah, but can send a link
to real, if serious. most are not. here.
as you can see there is just 1 relay. no DRL.
the engine size also dictates the fuse box size.
as does other major options. but if you open
your operators guide, it will have the fuse blow drawing there
and the relay shown.
the DRL module is just to right of steering shaft behind dash.
the Relays are just above left toe (USA CARS) and at Fuse box
(the boxes vary , so get the operators guide for your car, matching your engine. mines H25, below is simple non DRL.
the fsm covers it 100% get that.


30f17622-ea16-4609-bfd1-19401d2ff5b4.jpg

Aug 27, 2014 | 1999 Suzuki Grand Vitara

1 Answer

Daylights not working


10A fuse 16 in the central junction box supplies power to the DRL module. 15A fuse 15 in the battery junction box (BJB) supplies power to the DRL relay. DRL module output passes through 15A fuse 12 in the BJB and 15A fuses 2 and 3 in the BJB and is applied to the headlights. If all fuses are OK, the problem may be in the DRL relay, the DRL module or associated wiring

Oct 07, 2012 | 2002 Ford Escape

2 Answers

Daytime running lights not working


Assuming this is an LX, check 7.5A fuses 9 and 5 in the driver's underdash fuse/relay box. Fuse 9 applies power to the DRL indicator light in the gauge assembly which connects to the DRL control unit. Fuse 5 supplies power to the DRL control unit when the ignition is on. Also check 100A fuse 41 in the underhood fuse/relay box which supplies power to the headlight relays. Setting the headlight switch to HEAD causes the headlight relays to close and apply power through 20A fuses 45 and 43 in the underhood fuse/relay box to the low beams. Low beam power also passes through the DRL diode to close the high beam cut relay and prevent high beam use during DRL operation.

Sep 23, 2012 | 2002 Honda Accord

1 Answer

Headlamps inoperative daytime running lamps come on then go out jumped out headlamp switch ground circuit out still no headlamps.


It sounds like your DRL RELAY/Headlight relay. I had this happen with a 2000.

Please rate me if this helps You.

Here is some info that I hope is helpful to you.

This first part is how to disable the DRL
TOYOTA. From the Toyota technical service bulletin EL011-00 Web site for specific models determine where the module is; either the DRL relay or the body ECU, connector number, pin #. Oct 6,2000.

Avalon 1999 DRL relay D4 pin 1
Avalon 2000 body ECU B5 pin 6
Camry S/D 99* DRL relay D6 pin 23
Camry S/D 00* DRL relay D6 pin 10 *twilight sentinel
Camry Solara99/00* DRL relay D6 pin 23
Celica 2000* body ECU B6 pin 17
Corolla 99/00* DRL relay D3 pin 23
ECHO 2000 DRL relay D2 pin 12
4Runner 2000 DRL relay D8 pin 2
Land Cruiser 99/00 DRL relay D8 pin 2
MR2 Spyder 2000 DRL relay D2 pin 12
RAV4 99/00 DRL relay D17 pin 2
Sierra 99/00 DRL relay D4 pin 2
Tacoma 2000 DRL relay D8 pin 2
Tundra 2000 DRL relay D7 pin 2
-disconnect battery- Then remove the wire with pin attached and tape to the harness. (consider just cut and tape the wire) -check operation- [except the 2000 MY-Avalon, additionally you need to ground the wire at the module end of the cut wire]


And here is the Headlamp relay part number.

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Mar 19, 2010 | 1998 Toyota Corolla

1 Answer

Both Headlights Work On Lowbeam But Not On Highbeam.


First identify if your day running lights (DRL) are working. The DRL and high beams will work on the same relay. If your DRL are working, but not your high beams, you may need to replace your high beam relay which is found in the fuse panel under the hood of the engine at the right back corner; near the firewall, and passenger tire strut mount. If there is also a problem with your DRL with the high beams, its likely the DRL relay which can be found tucked under the dash.

There's usually a cover that says "relays", "fuses", etc. Lift the cover and look underneath, it should label the relays. If not, consult a manual or repair book. Try swapping similar relays from know working accessories if you don't have a new one handy.

Jan 15, 2009 | 1996 Honda Accord

1 Answer

Dash light DRL stays on


Bad solders in DRL relay located left side of steering column below change drawer behind dash. It will be indicated with a stamp DAYTIME RUNNING LIGHT RELAY. Remove it and redo the solders to the relay contacts in the unit. This will fix the DRL light in dash, return the DRL system to functioning and will also fix headlight not working problem.

Aug 10, 2008 | 1991 Honda Accord

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