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Lotus Europa Forums => Garage => Topic started by: kram350kram on Thursday,February 01, 2024, 07:13:52 AM

Title: DB10 relay
Post by: kram350kram on Thursday,February 01, 2024, 07:13:52 AM
Not sure on the operation of the DB10 relay irt the brake light switch input. As I understand it, power is  fed from the fuse to the brake switch to #5 on the relay and then to the brake light/turn signal #3 &7, then to bulbs to ground.  Does the stop light power input override the turn signal circuit when the brake is applied or do the flashers override the applied brake power?
 Any input appreciated.
Title: Re: DB10 relay
Post by: Clifton on Thursday,February 01, 2024, 12:52:46 PM
On S2's there isn't one, not even on the headlights. There isn't much amp draw/current on the brakes to really need a relay.
Title: Re: DB10 relay
Post by: dakazman on Thursday,February 01, 2024, 01:59:37 PM
  Kram,
  https://view.officeapps.live.com/op/view.aspx?src=http%3A%2F%2Fwww.lotus-europa.com%2Fmanuals%2Fmisc%2Felectrical%2FThe%2520Lucas%2520DB10%2520Relay.doc&wdOrigin=BROWSELINK
  This shows the internals of the DB10 , Hope it helps.

  here is another :http://www.lotus-europa.com/manuals/misc/electrical/DB10.jpg

 Then there is this mod, I haven't tried it yet to see what happens without it.
     http://www.lotus-europa.com/manuals/misc/electrical/Hazard%20light%20retrofit.pdf
Dakazman 
Title: Re: DB10 relay
Post by: kram350kram on Thursday,February 01, 2024, 05:54:46 PM
Think I figured it out, at least the possible cause of no brake lights.  The #5 DB10 terminal for the brake lights goes to ground, which is not correct. I bought a new Lucas unit which is all electronic, must have an internal short. Probably just put on the original DB10 that has no such short.
Title: Re: DB10 relay
Post by: dakazman on Sunday,February 04, 2024, 09:16:18 AM
  Kram that GP wire at the brake goes very close to the frame, you may want to ring out that wire and also the brake light switch.
  Just a thought.
Dakazman