Accessory Diode 2004 Buick Rendezvous

tree_ · Post by **tree_** » Tue January 05, 2021 7:55 pm

The HVAC blower stopped working so I was checking the interior fuses and I pulled the wrong one and dropped it beneath the fuse block. I can't get down in there. Out of frustration I just started the car and the AC was NOW WORKING but the windshield wipers WEREN'T!?! It turns out the missing "fuse" I dropped was the "accessory diode". What does this do? Does it have to be in there? Why would this have happened?! PLEASE HELP cause google doesn't have any answers.

JuanHamm · Post by **JuanHamm** » Tue January 05, 2021 7:57 pm

You drive a rendezvous? Yuck.

tree_ · Post by **tree_** » Tue January 05, 2021 7:59 pm

bought it cheap from mom.. it's OK don't be a snob.. we also have a 2006 pontiac G6

JuanHamm · Post by **JuanHamm** » Tue January 05, 2021 8:03 pm

I thought you were doing well financialy.

tree_ · Post by **tree_** » Tue January 05, 2021 8:03 pm

a little better than paycheck to paycheck... not great

JuanHamm · Post by **JuanHamm** » Tue January 05, 2021 8:07 pm

I see.

Is this what you need?

https://www.gmpartsgiant.com/parts/gm-d ... &filter=()

tree_ · Post by **tree_** » Tue January 05, 2021 8:10 pm

I can't tell.. probably.. can I just walk into a local auto parts store and say I need a tiny diode? My main question is do I even really need an "accessory diode"? Why would removing it fix the HVAC blower but kill the windshield wipers? Maybe it was just removing and plugging back in the fuse that fixed the blower? Why would the wipers die?!

tree_ · Post by **tree_** » Tue January 05, 2021 8:11 pm

I fucking hate this shit. Why do cars have to be so complicated?

JuanHamm · Post by **JuanHamm** » Tue January 05, 2021 8:12 pm

Those are all very good questions, but I can't answer any of them.

I think the best course of action is going to be replacing the diode and blaming the whole incident on shoddy GM engineering.

tree_ · Post by **tree_** » Tue January 05, 2021 8:14 pm

yeah that's what i figured.. it just doesn't make any sense

Self · Post by **Self** » Tue January 05, 2021 8:47 pm

The accessory diode probably acts as a relay. If that's true, it'll power up other things when you turn the key to acc and on. Get another one, pop it in, and hope. Debugging electrical issues in cars can suck.

Post by **Sgt. Crackpot** » Tue January 05, 2021 9:27 pm

A diode simply controls which way current flows to your flux capacitor. Removing it has probably created a matrix issue. Best to pour some nether fluid over the block to cleanse it of particle waves.

tree_ · Post by **tree_** » Tue January 26, 2021 6:44 pm

turns out I have to pay 300 to have the blower and resistor replaced

tree_ · Post by **tree_** » Thu February 04, 2021 5:04 pm

that sucked.. fucking hate the burden of vehicles

Red Mosquito

Accessory Diode 2004 Buick Rendezvous

Accessory Diode 2004 Buick Rendezvous

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Re: Accessory Diode 2004 Buick Rendezvous