flashing dash lights???

[Chard]

My dash lights for the battery, brake lights and door would all flicker every now and then and it is getting pretty annoying.

Could this possibly be a bad ground connection? Any ideas where I should start? Also, how do I check each one and what tools do I need for this?

Thanks for the help.

 

[Fozbo]

Is this when the car is running? Do you notice anything happening with the engine when it happens? Turbo / non turbo? Here is a schematic of the dash stuff on a 90 turbo: http://www.cygnusx1.net/supra/library/TSRM/mk3/manual.aspx?S=D&P=7 (more on the next page).

TSRM: http://www.cygnusx1.net/supra/library/TSRM/mk3/

General stuff: http://www.cygnusx1.net/Supra/techtips.aspx

 

[Poodles]

are you sure it's the door light?

sounds like when the regulator in the alternator is going out...

 

[Mr. Y]

Poodles
couln't you explain in details, please?
I have such issue: everything ok when engine idles or runs till 3K RPMs... But when I rev past 3K, dash lights (e-brake, CE..) gradually turn on (more brightly at higher RPM).

This problem appeared when I relocated battery to the trunk.
So, any ideas?

 

[Chard]

This happens when the car (90T) is running and nothing seems to be wrong with the engine whenever the lights would flicker. Just last night I noticed that the brake light would come on and would go off if I down shift from 5th to third and then come back on again when I go back to 5th. :icon_mad:

Is this when the car is running? Do you notice anything happening with the engine when it happens? Turbo / non turbo? Here is a schematic of the dash stuff on a 90 turbo: http://www.cygnusx1.net/supra/library/TSRM/mk3/manual.aspx?S=D&P=7 (more on the next page).

TSRM: http://www.cygnusx1.net/supra/library/TSRM/mk3/

General stuff: http://www.cygnusx1.net/Supra/techtips.aspx

 

[Chard]

are you sure it's the door light?

Unfortunately, I dont have the car with me right now. I was looking for an actual dash pic that I saw stickied on sf before under mk3 faq but its not showing up now, so I wish someone here has any link to one.

sounds like when the regulator in the alternator is going out...

Suppose to be a brand new alternator. The car used to be owned by Steve aka NJSupraA70.

 

[Chard]

Drove the car today and while driving, these dash lights are the ones that would flicker:

• E-brake on, or low brake fluid level
• Tail light failure indicator
• Battery light

The e-brake is down and the reservoir for the brake fluid is full. The battery is 1.5 yrs old and the car is driven about once every 7-10 days.

Any ideas???

 

[Poodles]

hmmm... forgot if those where the three lights..

I thought it was the CEL, brake, and battery light...

Try swapping the alt and see if it goes away, they MIGHT find it if they test the alt at a parts store...

Keep in mind if the regulator goes out it could cause some serious damage, even possible fire, so dont screw around with it...

 

[Chard]

Thanks Poodles, I'll try that and get back here.