LotusTalk - The Lotus Cars Community - Reply to Topic
Thread: DIY Blower Motor Resistor Pack Replacement Reply to Thread
Title:
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now



In order to be able to post messages on the LotusTalk - The Lotus Cars Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
03-22-2017 07:11 AM
T.Lund
Quote:
Originally Posted by SirLotus View Post
Just for information, it is not usually the resistors that go bad, but rather the terminals that corrode.
Additionally, there is a method to bypass the resistor pack with a little cutting, and the clam is not removed.
Michael
How do you do this?
12-15-2016 06:29 PM
Reach This is one job I will be glad to never do again.





Added 2 feet of cable to the direct motor lines. Will run them up toward the fuse area beneath the upper clam. Just wired for 1 speed now, I can come back and add the aftermarket resistors easily this way though if I want to.
08-01-2016 12:28 PM
exigegus looks like the connector type for the evaporator thermostat. The fan wires go through a rectangular black plug. Chase where they come from
08-01-2016 11:40 AM
speedycar
where is the resistor pack

Before I tear the whole car apart, my 2007 was built in April 2007. Is the resistor pack under the blower motor. These wires look like they go to the blower motor, haven't had a chance to chase them the other direction, but any help on where they lead to if they do go to a relocated resistor pack would be great.



Thanks,
06-29-2016 06:22 AM
exigeg2 No, while we call it a resistor issue, it is really a connector issue, and the main connector to the resistor pack will burn up leaving no fan at all

Check fuses etc, but it is most likely the resistor pack

you can access the wiring through the access panels and check if there is voltage to the wires going to the resistor pack. If it has voltage there, she must come apart
06-29-2016 05:54 AM
GPA Regarding the Resistor Pack Upgrade and Troubleshooting this issue.....
I have a 2005 Elise.
My Blower Fan is not working on ANY speed. Reading this thread, I see Sir Lotus states that "fan speed #3 is a direct path to the blower motor (does not go through Resistor Pack)." Does this mean that if fan speed #3 is not working, then the problem cannot be the Resistor Pack??
Any input appreciated.....
Greg
05-12-2016 09:25 PM
JvegasExige I wasn't able to find the 0.5 ohm so I did some searching and found the resistor pack for $65 on elise parts. Everyone else was asking $150 and up for it. Here's the link if anyone is interested.https://www.eliseparts.com/products/...-speed-module/
05-08-2016 04:20 PM
miketurbo thats just the thing though, it was working when i took it apart. so everything works..... just intermittently. could this be a switch issue? even when the blower is not working and the switch is on, I am able to cycle the AC button, making me think that the switch is fine and the issue was down stream some where. but all the blower parts look to be in excellent condition. at a bit of a loss here.
05-07-2016 06:22 PM
XtinctElise I would try hot-wiring it directly without the resistor pack and see if the blower motor functions properly
05-07-2016 04:52 PM
miketurbo So my A/C blower began working intermittently recently. It was an all or nothing sort of deal, but I figured since my car sits out side and is now 11 years old it must be this corrosion issue every one else is having/has had.

I decided to get in there and replace and upgrade it all with new fancy 50w resistors I bought off mouser. And while I'm in there, aluminum radiator, and SS brake lines. yay.

So I get the clam pulled off, and the brake lines replaced while having my sexy assistant (wife) pull the rear under tray and drain the oil. I pulled the radiator and A/C condenser, which was supper easy because the last person cross threaded the crap out of the condenser fittings. So now I have to get the fittings repaired. yipee. Finally got in there and deep enough to get the HVAC box out of there and the blower motor, after drowning it all in coolant from pulling the heater core hoses.

So here is where it gets fun. I'm poking around looking for the resistor pack, slightly baffled because my blower motor has only two wires rather than the 4 I'd expect. It turns out all of this has already been replaced at some point. There are fancy 50w resistors inside the HVAC box, and a new connector that goes to the blower motor, and a big sticker on the blower motor that says "genuine Lotus replacement part". fancy that. It has been done already. So I inspect all the wiring checking for corrosion, or anything else that could cause the issue now that I've dedicated 5 hours of "getting intimate with the front of my car" to. Nothing. Everything looks perfect. Except for the A/C condenser fittings that look like my dog chewed on them for 20 minutes.

So, does anyone have any ideas? What could cause my blower to be intermittent? Do I need to check anything else while I'm in there? I've had the car the last 10k of 50k miles and this just started happening. I have a couple days because I can't get that condenser fixed till Monday.

Anyway, fun continues tomorrow. Gotta re assemble what I can, and install the DSBrace from sector 111.
03-31-2016 03:27 PM
Supernaut WOW, thanks for the post. I was flipping out because I couldn't find the lower ohm part!
03-22-2016 09:44 AM
Michael here Hey guys after a few days deciding which route to take with the resistors, I just ordered some new resistors to replace the old ones. I noticed that some of the other ones listed are no longer available. I didn't want to go with double the ohms for fan speed 3 because its already slow enough, so I found a same ohm and watt rating resistor plus it seems to possible be of slightly better quality. It isn't domestically made but then again neither is almost anything nowadays relative to the USA. ANYWAY, here is the replacement resistor that I believe is perfectly exchangeable for the no longer available other .05 ohm resistor.

(The new .05 ohm 50 watt chassis mount(slightly different block design but correct specs and still mountable))
THS50R05J TE Connectivity / CGS | Mouser
RoHS: Compliant1
279-THS50R05J
THS50R05J
0.05 Ohms 50W 50PPM 03/22/16 1 3.91

And here are the other ones that are still available:

HS50 R22 J ARCOL / Ohmite | Mouser
RoHS: Compliant1
284-HS50-0.22
HS50 R22 J
50W .22 OHM 5% 03/22/16 1 3.75

HS50 R27 J ARCOL / Ohmite | Mouser
RoHS: Compliant1
284-HS50-0.27
HS50 R27 J
50W 0.27 OHM 5% 03/22/16 1 3.75


They carry them in stock and with USPS priority it usually ships same day before 12:01PM almost anywhere with 2 days transit for 7.99.(best deal to go with) CALL them direct if you like, it was easier and faster for me.
Contact Mouser (USA) (800) 346-6873


Merchandise Total $11.41
Shipping $7.99 Priority Mail w/ Tracker
Tax $0.00
TOTAL $19.40
02-24-2016 08:19 AM
Doge
Quote:
Originally Posted by itr632 View Post
Could you explain the little clamps that seem to connect each of the resistors together? Sorry, Im a newb.
I just soldered a piece of wire on them to connect the resistor ends.
02-24-2016 05:29 AM
itr632
Quote:
Originally Posted by rob13572468 View Post
This is the replacement resistor pack and the other pic are the individual resistors. The part is literally just the resistors mounted to a plate but otherwise its the exact same. The resistor values are 0.05, 0.22, and 0.27 ohms at 50 watts and the parts are available thru mouser (Mouser Electronics - Electronic Component Distributor)

284-HS50-0.05
284-HS50-0.22
284-HS50-0.27

They currently list at $4.70 each so thats $14.10 US for all three.
Could you explain the little clamps that seem to connect each of the resistors together? Sorry, Im a newb.
01-28-2016 08:16 AM
Doge
Quote:
Originally Posted by kfennell View Post
I just realized after reading this that I may have a different problem, ONLY #3 doesn't work on my car, is this possibly a resistor problem? 1 and 2 still work. I will have the clam off anyways so I will replace these, but if there is something else I should do I would like to do it!

OMG I already read this thread once and made the exact same question 3 posts up Jesus, I am going to leave this here in shame.
This is usually how it starts. And eventually you will lose all the speeds.
01-28-2016 04:06 AM
exigegus I suppose it could be the same thing, but what I have seen pictured, and what happened to mine, is the main fan motor wire rots off of the resistor pack, maybe your high speed wire rotted off first.

Only alternative is the switch, so you could ohm out the wires coming off of the switch, if you can see resistance to ground then the wiring is good. Or you could swap the wires around since the lower speeds work.

Odds are its the resistor pack tho
01-27-2016 11:42 AM
kfennell I just realized after reading this that I may have a different problem, ONLY #3 doesn't work on my car, is this possibly a resistor problem? 1 and 2 still work. I will have the clam off anyways so I will replace these, but if there is something else I should do I would like to do it!

OMG I already read this thread once and made the exact same question 3 posts up Jesus, I am going to leave this here in shame.
01-27-2016 10:13 AM
exigegus I just pulled mine out of my 07 Exige, and realized that the whole heater unit is exposed to the weather. well, duh, wonder why the wiring gets wet.

I am going to try larger resistors, since my math tells me 50 watts is too small without the fan blowing on them, and why have hot resistors in you AC plenum?

If someone's measured 18 amps is correct, over 250 watts, then even with the resistors it is seeing over 100 watts, so not wonder those connections vaporized
11-01-2015 09:30 AM
Im_Not_In_San_Fran
Quote:
Originally Posted by kfennell View Post
I have a question about this, I assuemed that I had a resistor pack problem as I just lost my #3 fan setting, is it possible that it is something else then as I just read above that the #3 doesn't use a resistor?
Thanks

I lost speed 3 first, then speeds 1 and 2 simultaneously. I suggest just waiting until you lose more speeds, and this will be your full confirmation.
11-01-2015 09:13 AM
kfennell I have a question about this, I assuemed that I had a resistor pack problem as I just lost my #3 fan setting, is it possible that it is something else then as I just read above that the #3 doesn't use a resistor?

Thanks
This thread has more than 20 replies. Click here to review the whole thread.

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 
For the best viewing experience please update your browser to Google Chrome