11

I'm trying to get to know my fuse and relay boxes better. They're labelled, but the labels are mostly acronyms and shorthand, and googling any particular acronym gives a lot of mentions of common tasks on forums but not any definitions or explanations (at least not that I can find).

I think it's probably easier to ask them all together and create a definitive go-to guide than have over a dozen questions which for an expert are absurdly easy with potentially one word answers. Maybe a great answer could help a novice like me understand how the different items interrelate. Note that StackExchange policy on "list questions" are that they're okay if they're clearly bounded and finite, like this, it's never-ending lists with an unlimited number of possibilities that are "too broad".

These are specific to my 1998 Toyota RAV4, but it'd be good to have a definitive universal resource, so please comment and/or feel free to include in answers any common ones for other makes that are missing.

Relays

  • E/G Main
  • H-LP
  • ST (I suspect this controls the starter motor but could be wrong)
  • EFI (95% sure this is "Engine Fuel Injection")
  • MG/C
  • DIM

Fuse acronyms are all detailed in the owner's guide, which for this model is available online, but relays are not detailed in the owner's guide at all.

Improve this question
4
  • 2
    h-lp would be headlamps, efi is as you say or electronic fuel injection, mg/c is for the air conditioning compressor magnetic clutch, st is for starter. – Ben May 3 '16 at 10:55
  • 1
    Never seen these things in user guides. Service guides - maybe. On Volvos DIM is the Driver Information Module, aka the instrument panel, aka dashboard. Could also be the for the headlight dimmer switch. – I have no idea what I'm doing May 3 '16 at 12:02
  • @Ben, please answer questions with an answer. Just because you don't know all of them doesn't mean it isn't a good answer. – JPhi1618 May 3 '16 at 13:31
  • And I thought Egyptian hieroglyphics were hard.... – Moab May 3 '16 at 15:49
8

Legend to Codes

E/G - Main is the relay for the Radiator fans.

EFI - Is the electronic fuel injection relay.

DIM - is the headlight dimmer relay.

H-LP - is the headlamp relay.

MG/C - is the air conditioning compressor magnetic clutch relay.

ST - is the starter relay.

Improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.