Operation CHARM: Car repair manuals for everyone.
Home >> Mazda >> 2005 >> Tribute 2WD L4-2.3L >> Repair and Diagnosis >> Lighting and Horns >> Trailer Lamps >> Testing and Inspection >> Pinpoint Tests >> Pinpoint Test 1
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Pinpoint Test 1

PINPOINT TEST 1: THE TRAILER LAMPS ARE INOPERATIVE

Step 1 - 4:




Step 5 - 6:









Normal Operation
Power to the trailer tow lamps is controlled by the SJB. Circuits (Y) and (DG) supply power to the trailer tow LH and RH stop/turn lamps respectively. Circuit (BR/W) supplies power to the trailer tow parking lamps. Ground for the trailer lamps is provided on circuit (B).

Possible Causes
- circuit (Y) open or short to ground
- circuit (B) open
- circuit (DG) open or short to ground
- circuit (BR/W) open
- trailer
- SJB
pro multis · About Operation CHARM