View Single Post
Lorenfb Lorenfb is offline
Registered User
Lorenfb's Avatar
Join Date: May 2003
Location: Manhattan Beach, CA
Posts: 2,352
The red ones, as John says, have a diode inside.
The diode is used to protect electronics which switch the
coil pins voltage (85 & 86). When voltage is removed
from a coil (like an ignition coil) a voltage spike occurs.
The diode "clamps" the voltage spike.

Have Fun
'88 3.2
Have Fun
Systems Consulting
Automotive Electronics

'88 911 3.2
'04 GSXR1000
'01 Ducati 996
'03 BMW BCR - Gone
Old 01-06-2004, 06:01 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)