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Correct wiring diagram for YFM45FAV

grizzlermann

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Apr 17, 2025
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I'm in the middle of restoring my 2006 Grizzly 450 and I hit a snag with some tricky ECU issues.
I'm consulting the OEM service manual but I found two wiring diagrams.. YFM450FHS and YFM450FHT.
They look identical to me so I'm confused which one to follow.
I don't want to make my ATV worse and fry something so I could use some help..
Anyone knows which is appropriate for my YFM45FAV?
 
I'm in the middle of restoring my 2006 Grizzly 450 and I hit a snag with some tricky ECU issues.
I'm consulting the OEM service manual but I found two wiring diagrams.. YFM450FHS and YFM450FHT.
They look identical to me so I'm confused which one to follow.
I don't want to make my ATV worse and fry something so I could use some help..
Anyone knows which is appropriate for my YFM45FAV?
Best to confirm if your YFM45FAV includes any unique components or upgrades that align with either diagram. Have you checked for notes in the manual that clarify compatibility?
 
I'm in the middle of restoring my 2006 Grizzly 450 and I hit a snag with some tricky ECU issues.
I'm consulting the OEM service manual but I found two wiring diagrams.. YFM450FHS and YFM450FHT.
They look identical to me so I'm confused which one to follow.
I don't want to make my ATV worse and fry something so I could use some help..
Anyone knows which is appropriate for my YFM45FAV?
AAAAH I FEEL YOU. The wiring diagrams aren't really easy to understand. So if you got the 2006 YFM450FAV then it might be closer to the FHT but still do the necessary checks and engine codes to be sureee.
 
I totally understand those diagrams can be tricky. Good idea to double-check with the FHT and run the codes just to be safe. It's always best to confirm things upfront than deal with problems later
 
I'm in the middle of restoring my 2006 Grizzly 450 and I hit a snag with some tricky ECU issues.
I'm consulting the OEM service manual but I found two wiring diagrams.. YFM450FHS and YFM450FHT.
They look identical to me so I'm confused which one to follow.
I don't want to make my ATV worse and fry something so I could use some help..
Anyone knows which is appropriate for my YFM45FAV?
I think that the YFM450FHT refers to an international model with independent rear suspension or maybe a model with different trim lever. It could be also candian model. As for YFM450FHS is usually for US models referring to the standard 4wd models. So according to that i think that your Yamaha aligns to the YFM450FHS diagram.
 
I'm in the middle of restoring my 2006 Grizzly 450 and I hit a snag with some tricky ECU issues.
I'm consulting the OEM service manual but I found two wiring diagrams.. YFM450FHS and YFM450FHT.
They look identical to me so I'm confused which one to follow.
I don't want to make my ATV worse and fry something so I could use some help..
Anyone knows which is appropriate for my YFM45FAV?
have you checked the full VIN or model code on the ATV? There might be a subtle letter or number difference in the full model name that corresponds to either FHS or FHT
 
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