Toyota MR2 Message Board - View Single Post

Timon · 10-23-2008, 05:12 AM

Well about 10 minutes ago I turned the car off and left it for maybe 5 minutes. When I went back out to it I noticed something odd. My turn signals on the dash were both lit up when I turned the power on. I started the car and it runs fine, but here are the issues I'm having, note everything ran wonderfully before turning the car off.

1. No headlights, they come up, but do not turn on.
2. The dash lights are extremely dim.
3. The voltage meter shows just over half when the lights are all off, but jumps down to only a few volts when I try to turn on the headlights.
4. When turning on the defrost I get a whole new set of issues
a. The tach goes down instead of up.
b. The dash lights do not work at all.
c. The turn signals do not work.
5. When the dash lights/tail lights are on the turn signals do not work at all, but they do work when the lights are all off.

Right now I'm really confused. Everything worked only minutes ago. The engine still runs fine, but now I have electrical problems up the ass. Also to note, the tail lights, brake lights, side markers all work without any problems that I've noticed yet.

Any suggestions? I've checked all the fuses I can (I can't check the big boxy fuses like the headlights since they have no clear plastic).

Edit: After posting this I of course went out and started playing some more. I found what I believe to be the relay for the dash/headlights. I turned the dash lights on and I got the same problem, dim, turn signals were lit up, however, when I turned the lights up I heard a grinding noise. Turns out it was coming from under my dash, right above the fuse box where I found a relay, part # 90987-02004.

When the relay is plugged in it makes a grinding noise and the above problems occur after pushing up the switch to turn on the lights. When the relay is pulled out, the grinding noise goes away, the dash lights turn, side markers, and tail lights all turn off, but the headlights turn on.

On a side note when the relay was plugged in and making the grinding noise my tachometer went to 6k and bounced, but the car was completely off.

Could this relay be causing all of these problems?

10-23-2008, 05:12 AM	#1 (permalink)
Timon MR2 MKI AW11 Join Date: Feb 2008 Location: Utah Posts: 669 Thanks: 13 Thanked 42 Times in 37 Posts My Google Map iTrader Rating: (1/100% )	Electrical Problem Well about 10 minutes ago I turned the car off and left it for maybe 5 minutes. When I went back out to it I noticed something odd. My turn signals on the dash were both lit up when I turned the power on. I started the car and it runs fine, but here are the issues I'm having, note everything ran wonderfully before turning the car off. 1. No headlights, they come up, but do not turn on. 2. The dash lights are extremely dim. 3. The voltage meter shows just over half when the lights are all off, but jumps down to only a few volts when I try to turn on the headlights. 4. When turning on the defrost I get a whole new set of issues a. The tach goes down instead of up. b. The dash lights do not work at all. c. The turn signals do not work. 5. When the dash lights/tail lights are on the turn signals do not work at all, but they do work when the lights are all off. Right now I'm really confused. Everything worked only minutes ago. The engine still runs fine, but now I have electrical problems up the ass. Also to note, the tail lights, brake lights, side markers all work without any problems that I've noticed yet. Any suggestions? I've checked all the fuses I can (I can't check the big boxy fuses like the headlights since they have no clear plastic). Edit: After posting this I of course went out and started playing some more. I found what I believe to be the relay for the dash/headlights. I turned the dash lights on and I got the same problem, dim, turn signals were lit up, however, when I turned the lights up I heard a grinding noise. Turns out it was coming from under my dash, right above the fuse box where I found a relay, part # 90987-02004. When the relay is plugged in it makes a grinding noise and the above problems occur after pushing up the switch to turn on the lights. When the relay is pulled out, the grinding noise goes away, the dash lights turn, side markers, and tail lights all turn off, but the headlights turn on. On a side note when the relay was plugged in and making the grinding noise my tachometer went to 6k and bounced, but the car was completely off. Could this relay be causing all of these problems? Last edited by Timon; 10-23-2008 at 09:13 AM..