My brake lights are in good working order but the check panel continues to stay lit for a brake light fault. Any ideas?
Announcement
Collapse
No announcement yet.
Check panel lit but brake lights functioning
Collapse
X
-
Also make sure you're using nickel bases on the bulbs (silver color). They have a different resistance than brass and can mess with the check system.Interested in vintage cars? Ever thought about racing one? Info, photos, videos, and more can be found at www.michaelsvintageracing.com!
Elva Courier build thread here!
Comment
-
The transistors that control the LED's can get stuck after 30 years, so keep that in mind, the check panel system can start to failOwner - Bavarian Restoration
BMW and European Electronics Repair and Restoration
www.BavRest.com
My Feedback Thread
Our Facebook!
Follow our Instagram!
Comment
-
You might have issues with the check control relay itself. Poor contact, cold solder joint cracks, or worn out reed relays.
I suggest you jumper across the brake light check relays (they're the two with less wire turns), and see if the check light persists. If so, then you have issues elsewhere in the check system.
The brake light check system is extremely finicky. If there is even the slightest delay, or the current drawn is even slightly too low, the light will come on. The reed relays are seriously underwound in my view by default. There is less than 100mA of current margin on them.
Comment
Comment