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sprinkles08, ASE Certified Technician
Category: Lexus
Satisfied Customers: 22523
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Won't start, no starter rotation even when jumping the

Customer Question

won't start, no starter rotation even when jumping the vehicle.
JA: Have you checked the battery, particularly the terminal connections? Are they corroded?
Customer: yes I checked the obvious, trying to figure out how to check the starter without removing it from the vehicle
JA: What is the model/year of your Lexus?
Customer: 1991 LS400
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: yes, I've replaced battery, cleaned cables and reseated starter relay
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 7 months ago.
Category: Lexus
Expert:  Craig Manning replied 7 months ago.

Hello my name is ***** ***** I will be helping you today.

Expert:  Craig Manning replied 7 months ago.

There a two hot wires going to your starter, one small (b+ cranking) and one large (b+ constant) if both are present the problem lies in your starter motor assembly.

Customer: replied 7 months ago.
Ok the starter is located under the intake manifold so I don't have access to starter, so how am I going to troubleshoot the starter
Expert:  Craig Manning replied 7 months ago.

Unfortunately the only way to diagnose those starter is to pull the intake manifold up (I prefer to have them bench tested)

Customer: replied 7 months ago.
Okay, I know there's a way to troubleshoot it without removing the intake manifold. Thanks for your time.
Expert:  Craig Manning replied 7 months ago.

The other option would be to have it towed to a shop with an electronic starting/charging system tester. I will say from experience it usually is the starters on that generation 4.0l

Expert:  Craig Manning replied 7 months ago.

I will opt out and see if anyone else knows another way!

Customer: replied 7 months ago.
Thanks but I'll pass
Expert:  sprinkles08 replied 7 months ago.

Hello and welcome to JustAnswer!

Do you still need help?

Customer: replied 7 months ago.
No I found my answer on you tube. Thanks KS anyway
Expert:  sprinkles08 replied 7 months ago.

Ii'm glad you got it repaired.

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